A

From the Etruscan letter 𐌀 (a), from the Ancient Greek letter Α (A, “alpha”), derived from the Phoenician letter 𐤀 (ʾ, “aleph”), from the Egyptian hieroglyph 𓃾.

Decimal 270 can be converted as duodecimal 1A6 or vigesimal DA.

(computing) The variable was a byte with value A0, or 160 in decimal.

Ten, especially used in bases above ten, such as duodecimal, hexadecimal, vigesimal and so on.


i

Pronunciation of IPA [iː]

* (mathematics, imaginary number): abbreviation of imaginary
* (engineering, electric current): abbreviation of French intensité du courant first used by M. André-Marie Ampère
* (computer programming, generic index): abbreviation of index
* (linguistics): abbreviation of identity

v=ir (Ohm's Law)

(engineering, often in bold) The current flow in an electric circuit, frequently measured in amperes.

(mathematics, programming) A common variable name representing a generic index, especially in loops.


r

Pronunciation of IPA [rɑː, ɑrrɑː] with the sound [r]


e

Close-mid front unrounded vowel
e
e (mathematical constant)

Pronunciation of IPA [eː]

Modification of capital letter E in uncial script, from Ancient Greek Ε (E, Epsilon).

1.2566e-6 = 1.2566 × 10⁻⁶

en:exponentiation symbol in scientific notation

(sciences, computing) Symbol separating mantissa from the exponent in scientific notation.


ADA

La fornitura di ADA attualmente in circolazione ammonta a 25.927.070.538 unità, mentre la fornitura totale è fissata a 31.112.483.745 ADA. Il prezzo di un ADA nel periodo di raccolta dei giudizi di somiglianza (Marzo-Aprile) si attesta a quasi 0,2 $ (coinmarketcap.com).

2017–2018, Federico Spitaleri, Definizione di mappe percettive delle criptovalute con maggiore capitalizzazione attraverso l’utilizzo del multidimensional scaling (thesis; in Italian), Luiss Guido Carli, archived from the original on 2022-06-07, page 38:

En estas fechas escogidas vemos la evolución que ha tenido ADA de 1 enero de 2021 a un precio de 0,14 euros por ADA y su máximo histórico se sitúa sobre 2,03 euros por ADA a 16 mayo de 2021.

2021, J.W. Benazco Ángel, G. García Machiñena Morell, Proyecto Cardano, tercera generación de criptomonedas (thesis; in Spanish), University of La Laguna, page 15:

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Cardano.


XXX

From the reduplication of X (“a placeholder for any letter or word”).
The currency code was adopted in October 1976 and officially introduced in 1978 with ISO 4217 by the International Organization for Standardization (ISO).

rdp

(computing) Used as a placeholder in source code to mark that some work still has to be done.


pu

electrical engineering
electrical engineering


Derives from overset Io, an abbreviation of either interiectiō (“interjection”) or the interjection iō (“hey!”), placed at the end of an exclamation to mark it as such. It expresses admiratio (“awe, wonderment”) in the clause.

punctuation mark denoting excitement, surprise, or shock

Character #1: "The zombie is right behind you!"

! [indicates that another trainer noticed the player character, prompting a battle between them]

1996, Game Freak, Pokémon Red and Blue, Nintendo:

! [indicates a random encounter with a monster]

2015 September 15, Toby Fox, Undertale, Linux, Microsoft Windows, OS X:

Denoting excitement, surprise, shock or sudden realizations.

(comics, video games) Used by itself to convey that a character is surprised at something.

Phoenix: I would like to go over this one more time. You met Adrian Andrews at a bar and took the request at that time? / de Killer: Yes, that is correct. / Phoenix: And that's the moment you thought 'he' was trustworthy... / de Killer: How many times must I repeat myself? Yes, that is correct. / Phoenix: I'm sorry, but that is an impossible tale. / de Killer: Wh-What!? / Phoenix: Shelly de Killer. You have never met the real Adrian Andrews! / de Killer: ...! Wh-Why would you say that...? / Phoenix: Because you made one very big slip-up... ...about her. / de Killer: So what is the issue... ...! / de Killer: Wh-What did you say just now...? About 'her'...? / Phoenix: If you had ever met Adrian Andrews in person... One look would have told you that she is a woman!

2002, Capcom, Phoenix Wright: Ace Attorney – Justice for All, Capcom:

(comics, video games) Used to convey that a character has made a sudden realization.


programming language
programming language

(computing, in many programming languages) A Boolean negation, the not operator, serving to invert the truth value of what follows.

(computing, e-mail) Formerly used as a separator between hostnames in an e-mail address for the purpose of routing a message (called bang path notation).

(computing, IRC) Used as a separator between a user's nickname and ident.


Tenth century “West Arabic” variation of the Nepali form of Hindu-Arabic numeral ٠ (compare Devanāgarī script ० (0)), adopted for use with the Latin script in Europe. See 0 § History for more.

0̸

slashed zero, available only as a combination of Unicode characters, variation selector or through font features

f : Bᵏ → B : B = {0, 1}

A&B&C=0 → A=0 || B=0 || C=0

(mathematics, computer science) A Boolean or truth value corresponding to false.

(computing) Indicates that the number that follows is in octal.

select currency expressions containing ‘0’


Tenth century “West Arabic” variation of the Nepali form of Hindu-Arabic numerals (compare Devanagari script १ (1, “éka”)), possibly influenced by Roman numeral Ⅰ, both ultimately from using a single stroke to represent the number one. See 1 § As a digit on WikipediaWikipedia for more.

(computer science) Bit state corresponding to binary digit 1, or on or true.


A stylized form of Latin et (“and”). Romans used such symbols (ligatures) from at least the first century C.E., but the character may not have acquired its present form until the advent of calligraphy in the Middle Ages. Compare ⁊ and +, of same meaning and similar derivation.

Ꜳꜳ Ææ ᴁᴭ Ǽǽ Ǣǣ Ꜵꜵ Åå Ꜷꜷ Ꜹꜹ Ꜻꜻ Ꜽꜽ ct ȸ Ǳǲǳ Ǆǅǆ ᴂᵆ ᴔ & ﬀ ﬁ ﬃ ﬂ ﬄ ℔ Ĳĳ Ǉǈǉ Ỻỻ Ŋŋ Ǌǋǌ Œœ ɶ Ꝏꝏ Ȣȣᴕ ȹ ẞß ﬅﬆ ᵫ Ůů Ww Ꝡꝡ

programming language
programming language#English

(programming) Used in some programming languages for different purposes.

1 & 0 = 0

Used to represent the binary operator and.

(networking) In a URL, separates each field-value pair of a query string.


Derives from the punctus versus.
The Italian printer Aldus Manutius established the practice of using the semicolon mark to separate words of opposed meaning, and to indicate interdependent statements. The earliest, general use of the semicolon in English was in 1591.

<?php echo '
Hello World
'; ?>

(programming) Marks the end of a statement in some programming languages.


η

(engineering) Efficiency in engineering.


NP

(computer science) The class of problems whose solutions can be checked in polynomial time.


(amateur radio, Morse code) "love"; "hugs and kisses"

amateur radio; Morse code; amateur radio; Morse code


$ appears to have evolved circa 1775 in the United States from a common abbreviation for pesos, also known as piastres or pieces of eight, a P/raised-S ligature P^S. It was used in the US before the adoption of the dollar in 1785.
The "computing" sense is the result of homophony between English cache and cash, dollars being a form of cash.

How to provide additional D$ bandwidth?

2010, CIS501 lecture notes (in English), University of Pennsylvania:


(programming) Prefix indicating a variable in some languages, such as Perl, PHP, or shell scripts.


(computing) Used as a multiplication symbol; ×.

The string ab*c matches “ac”, “abc”, “abbc”, “abbbc”, and so on.

(regular expressions) Used as a wildcard to detect zero or more occurrences of the preceding element.

In the language defined by AB*A, each string starts with an A, ends with a distinct A, and between them has zero or more Bs.

(algebra, computer science) Free monoid or Kleene star.


trans*

(chiefly computing) Uses especially in computing.

Used as a wildcard to denote zero or more characters.

(Internet) Used to indicate a field of a form that must be filled out.

I'm our of time. / *out

(Internet slang) Used before or after a word to show a correction has been made, chiefly by the same participant.


A cursive variation of ᾱ or ᾱᾱ, the abbreviation of Greek ἀνά (aná) used in recipes and prescriptions with the meaning "of each", and later extended to accounting. (Other explanations have that it is ā, an abbreviation of Latin ad (“to”), or French à (“to”).)

My e-mail address is psychonaut@example.com.

(computing) The symbol used as a separator between a username and a domain name in an e-mail address ("at" the domain name).

(computing, IRC) The most common choice of configurable prefix symbol to identify a channel operator.

Bob: How can I stop other people from accessing my files when they use my computer?

Jack: @Bob, you need to protect the files with a password.

(Internet) Prepended to the name of the user to whom a remark is addressed.

While I was dealing with the hounds, an orc tracker stumbled across @ from the east.

(video games) In roguelike games, the player character, conventionally represented by this symbol in character-based interfaces.


The lunar crescent is an ancient symbol for the moon.
Its orientation varies between increscent and decrescent.

rarely 🌙. In the medieval Marcianus graecus 299 manuscript

graphical user interface
graphical user interface

(graphical user interface, signage) Do not disturb; quiet.

(graphical user interface, computing) Sleep mode; off.

(graphical user interface) Night mode: a colour scheme with light text on a dark background.


SAT

Abbreviation of Boolean satisfiability problem.

abbrev

(computing theory) The decision problem of deciding whether a given Boolean formula has an assignment of Boolean values to its variables that makes it true. A famous NP-complete problem.


(computing) A common prefix for escape characters.

Coordinate term: /

(computing) A pathname component separator in some operating systems, predominantly Microsoft ones.

\7 matches the 7th subexpression

(regular expressions) Matches what the nth marked subexpression matched using parentheses: ( ).


exclusive disjunction
exclusive disjunction

(programming) Bitwise exclusive disjunction.

Press ^F to find text in your document.

(computing, as part of a keyboard shortcut) Control key.

^W = end of control block

control character
control character#English

(computing) Indicates an ASCII control character in caret notation.

^example$

(regular expressions) Matches the start position within the string. Compare $, which matches the end position within the string.

[^abc] matches any character other than "a", "b", or "c".

[^a-z] matches any single character that is not a lowercase letter from "a" to "z"

(regular expressions) Used with square brackets: [ ]. Matches a single character other than the characters and ranges specified between the square brackets.


From ᵒ/c, from Nᵒ/c, an abbreviation of Italian numero per cento (“number per hundred”). For the extension to Astraea is derived from the shift-5 key on the keyboard for asteroid (5).

der

(computing) Used as a wildcard, usually in SQL, to stand for zero or more characters.

(computing, programming) Used as the symbol for the modulus, placed between two numbers, to get the remainder of the division of those numbers.

uniform resource identifier
uniform resource identifier#English

(Internet) Used in the percent-encoding of uniform resource identifiers such as URLs.


(computing) user's home directory in Unix-like operating systems


lb

(computer science): From New Latin logarithmus binarii (“binary logarithm”).

lb(x)= log ₂(x). lb(2)=1

(computer science) Binary logarithm; logarithm to the base 2.


α

alpha

for names of this symbol in other language


Bd

(computing) Symbol for baud, a unit of data transfer rate.


Ba

After pronunciation of Mba (“Mba island”) in New Caledonia, motivated by bah humbug

A taxonomic genus within the family Charopidae – sole known species is Ba humbugi, a small air-breathing land snail.


Ba

(physics) The CGS symbol for barye, unit of pressure.


Ca

Moody's Investors Service
w:Moody's Investors Service

(finance) Long-term bond credit rating by Moody's Investors Service, indicating that a bond is extremely speculative and possibly in default, with some prospect of debt recovery.


Mg

(metrology) Symbol for megagram, an SI unit of mass equal to 10⁶ grams.


Π

arithmetical hierarchy
arithmetical hierarchy

polynomial hierarchy
polynomial hierarchy

universal quantifier
universal quantifier

(mathematics, logic, computer science) A class (in some hierarchy of formulae, like the arithmetical hierarchy or polynomial hierarchy) of those formulae whose outermost quantifiers are universal quantifiers.


(proscribed) An unofficial currency sign representing bitcoin, primarily used before its symbol (₿) was added to Unicode.


F

From the Etruscan letter 𐌅 (v, “ve”), from the Ancient Greek letter Ϝ (W, “digamma”), derived from the Phoenician letter 𐤅 (w, “waw”), from the Egyptian hieroglyph 𓏲.


peru

Clipping of Peruvian brown. Added to X11's rgb.txt file on October 26 1989.

peru:

(computer science) The X11 color name of RGB hexadecimal value #CD853F.


L

From the Etruscan letter 𐌋 (l, “el”), from the Ancient Greek letter Λ (L, “lambda”), derived from the Phoenician letter 𐤋 (l, “lamed”), from the Egyptian hieroglyph 𓌅.

(computer science) Deterministic logarithmic space


D

* (chemistry, deuterium): abbreviation of deuterium
* (computing, hexadecimal 13): From its position as the thirteenth element of the series {1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F}
* (Germany): abbreviation of German word Deutschland (“Germany”)

(computing) Hexadecimal symbol for thirteen.


E

From the Etruscan letter 𐌄 (e, “e”), from the Ancient Greek letter Ε (E, “epsilon”), derived from the Phoenician letter 𐤄 (h, “he”), from the Egyptian hieroglyph 𓀠.

2E5 = 2 × 10⁵

(sciences, computing) Symbol separating mantissa from the exponent in scientific notation.


C

* (element symbol, carbon): abbreviation
* (metrology, coulomb): abbreviation
* (computing, hexadecimal 12): From its position as the twelfth element of the series {1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F}

(computing, hexadecimal) The digit for 12.


P

From the Etruscan letter 𐌐 (p, “pe”), from the Ancient Greek letter Π (P, “pi”), derived from the Phoenician letter 𐤐 (p, “pe”), from the Egyptian hieroglyph 𓂋.

(computer science) class of problems solvable in polynomial time


K

From the Etruscan letter 𐌊 (k, “ka”), from the Ancient Greek letter Κ (K, “kappa”), derived from the Phoenician letter 𐤊 (k, “kap”), from the Egyptian hieroglyph 𓂧.

hydraulic conductivity
hydraulic conductivity

(geology) Symbol for hydraulic conductivity.


Y

A late borrowing from the Ancient Greek letter Υ (U, “ypsilon”), first used to write Greek loanwords in Latin, derived from the Phoenician letter 𐤅 (w, “waw”), from the Egyptian hieroglyph 𓏲. Doublet of U and V.

(mathematics, computer science) A Fixed-point combinator; especially Haskell Curry's combinator defined as λ f.(λ x.f (x x)) (λx.f (x x))


Z

From the Etruscan letter 𐌆 (z, “ze”), from the Ancient Greek letter Ζ (Z, “zeta”), derived from the Phoenician letter 𐤆 (z, “zayin”), from the Egyptian hieroglyph 𓏭.

(physics, computer graphics) the depth dimension in a 3D environment


U

From the Etruscan letter 𐌖 (u, “u”), from the Ancient Greek letter Υ (U, “ypsilon”), derived from the Phoenician letter 𐤅 (w, “waw”), from the Egyptian hieroglyph 𓏲. Doublet of Y and V.


S

From the Etruscan letter 𐌔 (s, “es”), from the Ancient Greek letter Σ (S, “sigma”), derived from the Phoenician letter 𐤔 (š, “šin”), from the Egyptian hieroglyph 𓌒.

(mathematics, computer science) The S ("substitution") combinator, defined as Sxyz = xz(yz), used in SKI calculus


SOL

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Solana.


DOT

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Polkadot.

Dominican Republic
ISO 3166-1 alpha-2
ISO 4217


ANG

(computing) Animated Network Graphics; an alternate name for APNG (Animated Portable Network Graphics)


I

From the Etruscan letter 𐌉 (i), from the Ancient Greek letter Ι (I, iota), derived from the Phoenician letter 𐤉 (y, yod), from the Egyptian hieroglyph 𓂝.

(physics, electronics) Electrical current.


.cd

. + ISO 3166-1 country code for the Democratic Republic of the Congo, CD.

Democratic Republic of the Congo
Democratic Republic of the Congo

The Internet country code top-level domain (ccTLD) for the Democratic Republic of the Congo.


There are two primary theories of the origin of the question mark. One is that ⟨?⟩ descends from the punctus interrogativus ⟨⹔⟩, which instructed the reader (or singer) to raise the pitch of their voice while coming to a stop.
Another theory is that it derives from overset Qo, an abbreviation of Latin quaestio (“question”), placed at the end of a question to mark it as such, and analogous to the derivation of ⟨!⟩.
There are no documented intermediary forms to support one theory over the other.

(programming) A wildcard for one character in query language.

(programming) The ternary operator in some programming languages.

The string colou?r matches both "color" and "colour".

(regular expressions) Detects zero or one occurrences of the preceding element.

(networking) In a URL, begins a query string (a series of data formatted as field-value pairs).


LTC

The token is the native cryptocurrency of Litecoin, an open-source blockchain project whose code is copied from Bitcoin’s. Though several non-native ETF issuers have launched crypto funds this year, this is the first filing for a fund tied to LTC.

2024 October 15, Helene Braun, “Ex-Valkyrie Founder’s Canary Capital Group Files for First Litecoin ETF”, in CoinDesk:

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Litecoin.


(computing, dated) ISO 2047 symbol for Line Feed.


In the modern sense as the equal sign, first attested in The Whetstone of Witte (1557) by Welsh mathematician Robert Recorde, in which the two parallel lines expressed equality, because, as Recorde wrote, "bicauſe noe .2. thynges, can be moare equalle" ("because no two things can be more equal").

abbr

The whetstone of witte, whiche is the seconde parte of Arithmetike: containyng thextraction of Rootes: The Coßike practise, with the rule of Equation: and the woorkes of Surde Nombers

(depending on context)

The statement f(x)=O(log²x) means that as x gets arbitrarily large, f(x) will never grow faster than some constant multiple of log²x.

(mathematics) The equal sign. It asserts that two quantities or expressions have the same value.

(mathematics, computing theory, abuse of notation, with big O notation) Is. Used to state the relation that the growth rate of the expression on the left side of the sign is bounded or limited by that of the expression on the right.

$price=18.95 (this causes $price to be 18.95 from now on)

(programming) The assignment operator. It assigns a value to a variable.

(programming) An operator that compares if two values are equal. In some languages, == is used instead.


mayday

Borrowed from French m’aider, short for Venez m’aider! or Viens m’aider! (“Come help me!”).

'Mayday! Mayday! Mayday!' came the call.

2004, Ken Wishaw, Helicopter Rescue: The true story of Australia's first full-time chopper doctor, page 82:


ξ

Joined, cursive variant of Ξ; see joined variant of Ξ at right, showing development of ξ.

chemical engineering
chemical engineering

(chemical engineering) Extent of reaction


x

Originates in given multiples of the speeds specified in the original CD and DVD standards, then, by reason of the actual unit being without name but just implied by the multiplication sign, reinterpreted as or used as if a unit, considering also that data transfer speed is variable, so that now, bolstered by stylization of the sign in the marketing of manufacturers, either spelling, with the multiplication sign or with the ex borrowed from the iconic mathematical variable sign, seems correct.

(computing) A unit of transfer rate of CD drives, equal to 150 KiB per second.

(computing) A unit of transfer rate of DVD drives, equal 1.32 MiB per second.


ang

(computing) Alternative letter-case form of ANG.


From the first letter of Mongolian төгрөг (tögrög).

(cryptocurrencies, informal) Symbol for the cryptocurrency Tether.


(computing, dated) ISO 2047 symbol for Shift Out


.ie

. + ISO 3166-1 country code for Ireland, IE.

The ccTLD for Ireland as assigned by the IANA.


.au

. + ISO 3166-1 country code for Australia, AU.

There is a policy for the issuing of Domain names for each of the .au sub-domains.

1995 November 29, Charles Moore, “Who determines Domain naming policy?”, in aus.net.policy (Usenet; in English):

also can someone explain what i need to do so google doesnt think i am duplicating since i have .com and .au of the same site?

2006 August 27, "Re: Adding a URL to show up on google.com.au? how?", in google.public.support.general, Usenet (in English):

2008 May 3, Phred, “.au domain name pricing variation [Was: woop-s - AUSTRALIAN Domain Name Renewals]”, in aus.computers (Usenet; in English):

I registered a .au domain and it was approved by auDa with a certificate of approval.

2009 February 4, j01, “auDa deleting .au without warning”, in aus.legal (Usenet; in English):

The ccTLD for Australia as assigned by the IANA.


(programming) Represents null coalescing operator or an operator with similar functions in some programming languages. Returns the second operand if the first returns null or is unset, with variations depending on the programming language.


sinc

(engineering) A symbol of the sinc function. (f(x) = sin(πx)/(πx))


.ac

. + the ISO 3166-1 country code for Ascension Island, AC.

The ccTLD for Ascension Island as assigned by the IANA.


.ae

. + ISO 3166-1 country code for United Arab Emirates, AE.

United Arab Emirates
United Arab Emirates

The ccTLD for United Arab Emirates as assigned by the IANA.


.ag

. + ISO 3166-1 country code for Antigua and Barbuda, AG.

The ccTLD for Antigua and Barbuda as assigned by the IANA.


.ad

. + ISO 3166-1 country code for Andorra, AD.

The ccTLD for Andorra as assigned by the IANA.


.an

. + ISO 3166-1 country code for Netherlands Antilles, an.

Netherlands Antilles
Netherlands Antilles

(historical) The ccTLD for Netherlands Antilles as assigned by the IANA.


.ao

. + ISO 3166-1 country code for Angola, AO.

The ccTLD for Angola as assigned by the IANA.


.af

. + ISO 3166-1 country code for Afghanistan, AF.

The ccTLD for Afghanistan as assigned by the IANA.


.am

. + ISO 3166-1 country code for Armenia, AM.

The ccTLD for Armenia as assigned by the IANA.


.al

. + ISO 3166-1 country code for Albania, AL.

The ccTLD for Albania as assigned by the IANA.


.ax

. + ISO 3166-1 country code for Åland Islands, AX.

The ccTLD for Åland Islands as assigned by the IANA.


.aq

. + ISO 3166-1 country code for Antarctica, AQ.

The ccTLD for Antarctica as assigned by the IANA.


.at

. + ISO 3166-1 country code for Austria, AT.

The ccTLD for Austria as assigned by the IANA.


.bu

. + ISO 3166-1 country code for Burma, bu.

The ccTLD for Burma (not in use since re-naming of country to Myanmar, see .mm) as assigned by the IANA.


.ar

. + ISO 3166-1 country code for Argentina, AR.

The ccTLD for Argentina as assigned by the IANA.


.bh

. + ISO 3166-1 country code for Bahrain, BH.

The ccTLD for Bahrain as assigned by the IANA.


.ba

. + ISO 3166-1 country code for Bosnia and Herzegovina, BA.

Bosnia and Herzegovina
Bosnia and Herzegovina

The ccTLD for Bosnia and Herzegovina as assigned by the IANA.


.aw

. + ISO 3166-1 country code for Aruba, AW.

The ccTLD for Aruba as assigned by the IANA.


.bb

. + ISO 3166-1 country code for Barbados, BB.

The ccTLD for Barbados as assigned by the IANA.


.bg

. + ISO 3166-1 country code for Bulgaria, BG.

The ccTLD for Bulgaria as assigned by the IANA.


.az

. + ISO 3166-1 country code for Azerbaijan, AZ.

The ccTLD for Azerbaijan as assigned by the IANA.


.bd

. + ISO 3166-1 country code for Bangladesh, BD.

The ccTLD for Bangladesh as assigned by the IANA.


.bf

. + ISO 3166-1 country code for Burkina Faso, BF.

The ccTLD for Burkina Faso as assigned by the IANA.


.bn

. + ISO 3166-1 country code for Brunei, BN.

The ccTLD for Brunei as assigned by the IANA.


.bm

. + ISO 3166-1 country code for Bermuda, BM.

The ccTLD for Bermuda as assigned by the IANA.


.bi

. + ISO 3166-1 country code for Burundi, BI.

The ccTLD for Burundi as assigned by the IANA.


.be

. + ISO 3166-1 country code for Belgium, BE.

The ccTLD for Belgium as assigned by the IANA.


.bv

. + ISO 3166-1 country code for Bouvet Island, bv.

The ccTLD for Bouvet Island (not in use; no registrations) as assigned by the IANA.


.br

. + ISO 3166-1 country code for Brazil, BR.

The ccTLD for Brazil as assigned by the IANA.


.bj

. + ISO 3166-1 country code for Benin, BJ.

The ccTLD for Benin as assigned by the IANA.


.bo

. + ISO 3166-1 country code for Bolivia, BO.

The ccTLD for Bolivia as assigned by the IANA.


.bt

. + ISO 3166-1 country code for Bhutan, BT.

The ccTLD for Bhutan as assigned by the IANA.


.bw

. + ISO 3166-1 country code for Botswana, BW.

The ccTLD for Botswana as assigned by the IANA.


.ca

. + ISO 3166-1 country code for Canada, CA.

The ccTLD for Canada as assigned by the IANA.


.bs

. + ISO 3166-1 country code for the Bahamas, BS.

The ccTLD for the Bahamas as assigned by the IANA.


.cf

. + ISO 3166-1 country code for Central African Republic, CF.

Central African Republic
Central African Republic

The ccTLD for Central African Republic as assigned by the IANA.


.cc

. + ISO 3166-1 country code for Cocos (Keeling) Islands, CC.

Cocos (Keeling) Islands
Cocos (Keeling) Islands

The ccTLD for Cocos (Keeling) Islands as assigned by the IANA.


.by

. + ISO 3166-1 country code for Belarus, BY. Derived from Byelorussia, the country's name until 1991.

The ccTLD for Belarus as assigned by the IANA.


.ck

. + ISO 3166-1 country code for Cook Islands, CK.

The ccTLD for Cook Islands as assigned by the IANA.


.cl

. + ISO 3166-1 country code for Chile, CL.

The ccTLD for Chile as assigned by the IANA.


.cu

. + ISO 3166-1 country code for Cuba, CU.

The ccTLD for Cuba as assigned by the IANA.


.cm

. + ISO 3166-1 country code for Cameroon, CM.

The ccTLD for Cameroon as assigned by the IANA.


.cn

. + ISO 3166-1 country code for People's Republic of China, CN.

People's Republic of China
People's Republic of China

The ccTLD for People's Republic of China as assigned by the IANA.


.co

. + ISO 3166-1 country code for Colombia, CO.

The ccTLD for Colombia as assigned by the IANA.


.er

. + ISO 3166-1 country code for Eritrea, er.

The ccTLD for Eritrea as assigned by the IANA.


.cr

. + ISO 3166-1 country code for Costa Rica, CR.

The ccTLD for Costa Rica as assigned by the IANA.


.eh

. + ISO 3166-1 country code for Western Sahara, eh.

The ccTLD for Western Sahara (not assigned; no DNS) as assigned by the IANA.


.ch

. + ISO 3166-1 country code for Switzerland, CH (short for "Confoederatio Helvetica", the Latin name of Switzerland).

The ccTLD for Switzerland as assigned by the IANA.


.cx

. + ISO 3166-1 country code for Christmas Island, CX.

The ccTLD for Christmas Island as assigned by the IANA.


.cy

. + ISO 3166-1 country code for Cyprus, CY.

The ccTLD for Cyprus as assigned by the IANA.


.cz

. + ISO 3166-1 country code for Czech Republic, CZ.

The ccTLD for Czech Republic as assigned by the IANA.


.dj

. + ISO 3166-1 country code for Djibouti, DJ.

The ccTLD for Djibouti as assigned by the IANA.


.dz

. + ISO 3166-1 country code for Algeria, DZ.

The ccTLD for Algeria as assigned by the IANA.


.cs

. + ISO 3166-1 country code for Serbia and Montenegro, cs.

Serbia and Montenegro
Serbia and Montenegro

The ccTLD for Serbia and Montenegro (formerly .yu - Yugoslavia; Note: on June 3, 2006, Montenegro declared independence, thus dissolving the state union) (.cs code not assigned; no DNS) as assigned by the IANA.


.cg

. + ISO 3166-1 country code for Republic of the Congo, CG.

Republic of the Congo
Republic of the Congo

The ccTLD for Republic of the Congo as assigned by the IANA.


.ci

. + ISO 3166-1 country code for Côte d'Ivoire, CI.

The ccTLD for Côte d'Ivoire as assigned by the IANA.


.et

. + ISO 3166-1 country code for Ethiopia, ET.

The ccTLD for Ethiopia as assigned by the IANA.


.ga

. + ISO 3166-1 country code for Gabon, GA.

The ccTLD for Gabon as assigned by the IANA.


.do

. + ISO 3166-1 country code for Dominican Republic, DO.

The ccTLD for Dominican Republic as assigned by the IANA.


.fo

. + ISO 3166-1 country code for Faroe Islands, FO.

The ccTLD for Faroe Islands as assigned by the IANA.


.eu

. + ISO 3166-1 country code for European Union, EU.

The ccTLD for European Union (code "exceptionally reserved" by ISO 3166-1) as assigned by the IANA.


.gl

. + ISO 3166-1 country code for Greenland, GL.

The ccTLD for Greenland as assigned by the IANA.


.gq

. + ISO 3166-1 country code for Equatorial Guinea, GQ.

The ccTLD for Equatorial Guinea as assigned by the IANA.


.gd

. + ISO 3166-1 country code for Grenada, GD.

The ccTLD for Grenada as assigned by the IANA.


.cv

. + ISO 3166-1 country code for Cape Verde, CV.

The ccTLD for Cape Verde as assigned by the IANA.


.fk

. + ISO 3166-1 country code for Falkland Islands, FK.

The ccTLD for Falkland Islands as assigned by the IANA.


.gg

. + ISO 3166-1 country code for Guernsey, GG.

The ccTLD for Guernsey as assigned by the IANA.


.gi

. + ISO 3166-1 country code for Gibraltar, GI.

The ccTLD for Gibraltar as assigned by the IANA.


.gp

. + ISO 3166-1 country code for Guadeloupe, GP.

The ccTLD for Guadeloupe as assigned by the IANA.


.gf

. + ISO 3166-1 country code for French Guiana, GF.

The ccTLD for French Guiana as assigned by IANA.


.gh

. + ISO 3166-1 country code for Ghana, GH.

The ccTLD for Ghana as assigned by the IANA.


.gw

. + ISO 3166-1 country code for Guinea-Bissau, GW.

The ccTLD for Guinea-Bissau as assigned by the IANA.


.gs

. + ISO 3166-1 country code for South Georgia and the South Sandwich Islands, GS.

The ccTLD for South Georgia and the South Sandwich Islands as assigned by the IANA.


.gt

. + ISO 3166-1 country code for Guatemala, GT.

The ccTLD for Guatemala as assigned by the IANA.


.fm

. + ISO 3166-1 country code for Federated States of Micronesia, FM.

Federated States of Micronesia
Federated States of Micronesia

The ccTLD for Federated States of Micronesia as assigned by the IANA.


.io

. + ISO 3166-1 country code for British Indian Ocean Territory, IO.

British Indian Ocean Territory
British Indian Ocean Territory

The ccTLD for British Indian Ocean Territory as assigned by the IANA.


.gu

. + ISO 3166-1 country code for Guam, GU.

The ccTLD for Guam as assigned by the IANA.


.gn

. + ISO 3166-1 country code for Guinea, GN.

The ccTLD for Guinea as assigned by the IANA.


.hu

. + ISO 3166-1 country code for Hungary, HU.

The ccTLD for Hungary as assigned by the IANA.


.bz

. + ISO 3166-1 country code for Belize, BZ.

The ccTLD for Belize as assigned by the IANA.


.je

. + ISO 3166-1 country code for Jersey, JE.

The ccTLD for Jersey as assigned by the IANA.


.hm

. + ISO 3166-1 country code for Heard Island and McDonald Islands, HM.

Heard Island and McDonald Islands
Heard Island and McDonald Islands

The ccTLD for Heard Island and McDonald Islands as assigned by the IANA.


.gy

. + ISO 3166-1 country code for Guyana, GY.

The ccTLD for Guyana as assigned by the IANA.


.im

. + ISO 3166-1 country code for Isle of Man, IM.

The ccTLD for Isle of Man as assigned by the IANA.


.hk

. + ISO 3166-1 country code for Hong Kong, HK.

The ccTLD for Hong Kong as assigned by the IANA.


.hr

. + ISO 3166-1 country code for Croatia, HR, from Serbo-Croatian Hrvatska.

The ccTLD for Croatia as assigned by the IANA.


.iq

. + ISO 3166-1 country code for Iraq, IQ.

The ccTLD for Iraq as assigned by the IANA.


.gm

. + ISO 3166-1 country code for the Gambia, GM.

The ccTLD for the Gambia as assigned by the IANA.


.ir

. + ISO 3166-1 country code for Iran, IR.

The ccTLD for Iran as assigned by the IANA.


.gr

. + ISO 3166-1 country code for Greece, GR.

The ccTLD for Greece as assigned by the IANA.


.kg

. + ISO 3166-1 country code for Kyrgyzstan, KG.

The ccTLD for Kyrgyzstan as assigned by the IANA.


.ke

. + ISO 3166-1 country code for Kenya, KE.

The ccTLD for Kenya as assigned by the IANA.


.lb

. + ISO 3166-1 country code for Lebanon, LB.

The ccTLD for Lebanon as assigned by the IANA.


.jp

. + ISO 3166-1 country code for Japan, JP.

The ccTLD for Japan as assigned by the IANA.


.ht

. + ISO 3166-1 country code for Haiti, HT.

The ccTLD for Haiti as assigned by the IANA.


.km

. + ISO 3166-1 country code for Comoros, KM, from Ndzwani Comorian Komori.

The ccTLD for Comoros as assigned by the IANA.


.kr

. + ISO 3166-1 country code for South Korea, KR.

The ccTLD for South Korea as assigned by the IANA.


.il

. + ISO 3166-1 country code for Israel, IL.

The ccTLD for Israel as assigned by the IANA.


.li

. + ISO 3166-1 country code for Liechtenstein, LI.

The ccTLD for Liechtenstein as assigned by the IANA.


.la

. + ISO 3166-1 country code for Laos, LA.

The ccTLD for Laos as assigned by the IANA.


.lc

. + ISO 3166-1 country code for Saint Lucia, LC.

The ccTLD for Saint Lucia as assigned by the IANA.


.is

. + ISO 3166-1 country code for Iceland, IS, from Icelandic Ísland.

The ccTLD for Iceland as assigned by the IANA.


.it

. + ISO 3166-1 country code for Italy, IT.

The ccTLD for Italy as assigned by the IANA.


.ky

. + ISO 3166-1 country code for Cayman Islands, KY.

The ccTLD for Cayman Islands as assigned by the IANA.


.in

. + ISO 3166-1 country code for India, IN.

The ccTLD for India as assigned by the IANA.


.ly

. + ISO 3166-1 country code for Libya, LY.

The ccTLD for Libya as assigned by the IANA.


.kn

. + ISO 3166-1 country code for Saint Kitts and Nevis, KN.

Saint Kitts and Nevis
Saint Kitts and Nevis

The ccTLD for Saint Kitts and Nevis as assigned by the IANA.


.lv

. + ISO 3166-1 country code for Latvia, LV.

The ccTLD for Latvia as assigned by the IANA.


.mm

. + ISO 3166-1 country code for Myanmar, MM.

The ccTLD for Myanmar (formerly .bu - Burma) as assigned by the IANA.


.ls

. + ISO 3166-1 country code for Lesotho, LS.

The ccTLD for Lesotho as assigned by the IANA.


.lt

. + ISO 3166-1 country code for Lithuania, LT.

The ccTLD for Lithuania as assigned by the IANA.


.lu

. + ISO 3166-1 country code for Luxembourg, LU.

The ccTLD for Luxembourg as assigned by the IANA.


.mg

. + ISO 3166-1 country code for Madagascar, MG.

The ccTLD for Madagascar as assigned by the IANA.


.lr

. + ISO 3166-1 country code for Liberia, LR.

The ccTLD for Liberia as assigned by the IANA.


.kp

. + ISO 3166-1 country code for North Korea, KP, from English DPRK.

The ccTLD for North Korea as assigned by the IANA.


.mc

. + ISO 3166-1 country code for Monaco, MC.

The ccTLD for Monaco as assigned by the IANA.


.mh

. + ISO 3166-1 country code for Marshall Islands, MH.

The ccTLD for Marshall Islands as assigned by the IANA.


.md

. + ISO 3166-1 country code for Moldova, MD.

The ccTLD for Moldova as assigned by the IANA.


.kh

. + ISO 3166-1 country code for Cambodia, KH, from Khmer ខ្មែរ (khmae).

The ccTLD for Cambodia as assigned by the IANA.


.ma

. + ISO 3166-1 country code for Morocco, MA, from French Maroc.

The ccTLD for Morocco as assigned by the IANA.


.mq

. + ISO 3166-1 country code for Martinique, MQ.

The ccTLD for Martinique as assigned by the IANA.


.mk

. + ISO 3166-1 country code for Republic of North Macedonia, MK, from Macedonian Северна Македонија (Severna Makedonija).

der

Северна Македонија

Republic of North Macedonia
Republic of North Macedonia

The ccTLD for Republic of North Macedonia as assigned by the IANA.


.hn

. + ISO 3166-1 country code for Honduras, HN.

The ccTLD for Honduras as assigned by the IANA.


.ki

. + ISO 3166-1 country code for Kiribati, KI.

The ccTLD for Kiribati as assigned by the IANA.


.lk

. + ISO 3166-1 country code for Sri Lanka, LK.

The ccTLD for Sri Lanka as assigned by the IANA.


.mo

. + ISO 3166-1 country code for Macau, MO, from English Macao.

The ccTLD for Macau as assigned by the IANA.


.mp

. + ISO 3166-1 country code for Northern Mariana Islands, MP, an abbreviation of Marianas Pacific.

Northern Mariana Islands
Northern Mariana Islands

The ccTLD for Northern Mariana Islands as assigned by the IANA.


.dk

. + ISO 3166-1 country code for Denmark, DK.

The ccTLD for Denmark as assigned by the IANA.


.fj

. + ISO 3166-1 country code for Fiji, FJ.

The ccTLD for Fiji as assigned by the IANA.


.de

. + ISO 3166-1 country code for Germany, DE, from German Deutschland.

The ccTLD for Germany as assigned by the IANA.


.id

. + ISO 3166-1 country code for Indonesia, ID.

The ccTLD for Indonesia as assigned by the IANA.


.as

. + ISO 3166-1 country code for American Samoa, AS.

The ccTLD for American Samoa as assigned by the IANA.


.ai

. + ISO 3166-1 country code for Anguilla, AI.

The ccTLD for Anguilla as assigned by the IANA.


.ai

The file extension for "Adobe Illustrator"


.ml

. + ISO 3166-1 country code for Mali, ML.

The ccTLD for Mali as assigned by the IANA.


.kz

. + ISO 3166-1 country code for Kazakhstan, KZ.

The ccTLD for Kazakhstan as assigned by the IANA.


.dm

. + ISO 3166-1 country code for Dominica, DM.

The ccTLD for Dominica as assigned by the IANA.


.jo

. + ISO 3166-1 country code for Jordan, JO.

The ccTLD for Jordan as assigned by the IANA.


.jm

. + ISO 3166-1 country code for Jamaica, JM.

The ccTLD for Jamaica as assigned by the IANA.


.mn

. + ISO 3166-1 country code for Mongolia, MN.

The ccTLD for Mongolia as assigned by the IANA.


.fi

. + ISO 3166-1 country code for Finland, FI.

The ccTLD for Finland as assigned by the IANA.


.kw

. + ISO 3166-1 country code for Kuwait, KW.

The ccTLD for Kuwait as assigned by the IANA.


used when omitting a section in quoted text

Save as...

Find and replace...

(computing) Indicates that a computer command will request further information, typically by opening a dialog box.


head

+ (English symbol name plus sign or plus)

plus sign (English name symbol)
plus (English name symbol)

antonym(s) of “addition or positiveness”

From a ligature of Latin et (“and”). Compare & and ⁊ of same meaning.

"My name is " + name + ". I am " + age + " years old."

(programming) A string concatenation in some programming languages (that might be ambiguous with an additive operation).

The string ab+c matches "abc", "abbc", "abbbc", and so on, but not "ac".

(regular expressions) Detects one or more occurrences of the preceding element.


Press Ctrl+C to copy!

(computing) When placed between key names, indicates that they should be pressed simultaneously.


.com

There are some exceptions again www.mayoclinic.com, is a very quality site and it's a .com, MedlinePlus has bought the .com URL of course.

2007, Karyn Prechtel, “Bridging the Gap Between Doctor & Patient: Delivering Relevant Health Information”, in Bruce Fulton, editor, ¡Salud, Se Puede!: Proceedings of the 2007 Trejo Foster Foundation Institute (in English), page 145:

(Internet) An Internet top-level domain.


.biz

(Internet) An Internet top-level domain indicating that a website is engaged in business over the Internet.


.edu

(Internet) An Internet top-level domain indicating that a website is used by an educational institution.


.org

(Internet) An Internet top-level domain intended to indicate that a website is used by an organization.


.gov

(Internet) An Internet top-level domain indicating that a website is used by a government institution.


.mil

(Internet) An Internet top-level domain indicating that a website is used by a military institution.


.museum

(Internet) An Internet top-level domain reserved for the exclusive use of museums, museum associations, and individual members of the museum profession, as these groups are defined by the International Council of Museums (ICOM).


ld

Abbreviation of Latin logarithmus dualis.

log ₂(x)=ld(x). ld(2)=1

(computer science) binary logarithm; logarithm to the base 2


lg

(mathematics and computer science): Abbreviation of Latin logarithmus generalis.

lg (x)= log ₂(x). lg (2)=1

(computer science) binary logarithm; logarithm to the base 2.


.int

(Internet) An Internet top-level domain reserved for international treaty organizations and non-governmental organizations with "observer" status at the United Nations.


FITA

w:Fédération Internationale de Tir à l'Arc

Acronym of Fédération Internationale de Tir à l'Arc; the governing body of archery


(computing, dated) ISO 2047 symbol for Space


(computing, dated) ISO 2047 symbol for Escape


pan-pan

From English pan-pan, from French panne (“breakdown”).

(radio slang) minor emergency requiring some assistance, not life-threatening


(English name slash or stroke or solidus)

slash (English name)
stroke (English name)
solidus (English name)

The various uses of the present symbol derive from several sources. The medieval virgule (Latin virgula) was an oblique or vertical line that served as a comma, period, and caesura mark and is still used in literary contexts to mark line breaks in verse. (This mark separately developed as the comma ⟨,⟩ and caesura mark ⟨‖⟩ and some senses of the vertical bar ⟨|⟩.) The shilling mark (Latin solidus) was variously written s. or as the long s ſ. This eventually developed into a single unpunctuated slash; its use to separate shillings from pence was sometimes generalized to any currency division. Most mathematical senses derived from the earlier horizontal fraction bar (as in 12, usually attributed to Arabic mathematician al-Hassar), rewritten with a slash by the 18th century to permit fractions to be written on a single line. As a separator and conjunction, it represents an oblique form of the dash ⟨–⟩ or hyphen ⟨-⟩. Its use to mark supposed actions derives from command formatting in online chat forums, while its use to comment on preceding text derives from its use in some programming languages to form closing tags. Its present British name stroke derives from its use in telegraphy; its present American name slash gained wide currency from its use in computing.

QUIT? Y/N

(computing) Used to separate commands or keys that can be typed, usually in a command prompt.

I support him completely /sarcasm

(informal, programming, text messaging) Denotes a given attribute of the preceding content in the manner of a closing tag. See tone tag.

(computing) Used to separate the nested directory levels in a file or URL path.

operating system
operating system#English

(when used in isolation) The root path of a Unix or Unix-like operating system.


(computing, dated) The ISO 2047 symbol for Start of Text.


(cryptocurrencies) The symbol for cryptocurrency Solana.


(programming) Decrement by 1 in certain programming languages such as C and Java.

if pizza == "plain cheese" -- Checks if pizza is "plain cheese".

SELECT id, name, birth_date -- Selects fields from a table.

programming language
programming language#English

(programming) Starts a single-line comment in some programming languages, including Ada, Haskell, and Lua, as well as some query languages.


^W

control character
control character#English

(computing) The ASCII control character end of transmission block in caret notation.


^H

(computing) The ASCII control character backspace in caret notation.


kS

(metrology, electronics) Symbol for the kilosample, a unit equal to 10³ samples.


.name

(Internet) An Internet top-level domain designated for use with individuals' real names, nicknames, screen names, pseudonyms or other personal names.


GRC

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Gridcoin.


(programming) Alternative form of << (left shift operator).


Introduced by the B programming language, which also used "!" for boolean negation, and inherited by its successor C. Later adopted more widely.

(programming) In some programming languages, an operator that compares two values for inequality, yielding a true result if they differ.


(programming) Alternative form of >> (right shift operator).


✓ (English symbol name tick or checkmark or check)

tick (English name symbol)
checkmark (English name symbol)
check (English name symbol)

(computing, dated) ISO 2047 symbol for Acknowledge.


(programming) Alternative form of <<< (left shift operator).


(computing, dated) ISO 2047 symbol for Carriage Return


(computing, dated) ISO 2047 symbol for Horizontal Tabulation


(programming) Alternative form of >>> (right shift operator).


(computing) cloud technology (computing, storage)


(computing) The object replacement character, sometimes used to represent an embedded object in a document when it is converted to plain text.


Mordecai: He's not even here. He's playing basketball. […] You snooze, you lose. I'm sure this will only take a second anyways.

2011, "Slam Dunk", season 3, episode 7 of Regular Show Rigby: You can't even [create a website] right now, anyway. Muscle Man has the computer for the whole day. […]

[Mordecai turns on the computer, and an hourglass appears on the screen while the computer is booting.]

graphical user interface
graphical user interface

(graphical user interface) Indicates that the current application is busy performing an operation.

(only ⧖) (computing, dated) ISO 2047 symbol for Cancel


A viewdata square; a symbol available on the viewdata system, replacing the underscore, which could not be displayed on the viewdata hardware.

A key available on telephone keypads, to the right of 0.


In mathematics, first introduced by Nicolas Bourbaki in their treatise Éléments de mathématique.

(mathematics, computer science) Used to mark an especially difficult passage or proof in a textbook.

Bourbaki dangerous bend symbol
Nicolas Bourbaki
Éléments de mathématique


★ (English symbol name star or five-pointed star)

star (English name symbol)
five-pointed star (English name symbol)

Likely from Egyptian 𓇼 (“determinative for stars and constellations”) (image: dwA). However, around the same time in Mesopotamia, non-cuneiform depictions of a star with eight- or six-points are attested; compare Sumerian 𒀭, a cuneiform character descended from such drawings.

der

(graphical user interface) Favourite (“to add to one's list of favourite items on a website or service that allows users to compile such lists”); favourites.

(chiefly video games) An achievement; rewards.

A mark of excellence.
An achievement; rewards.

Indicates something or someone noteworthy, important, special or significant.

(graphical user interface) Bookmark (“to create a record of the address of a file or Internet page, serving as a shortcut to it”); bookmarks; save; saved items.

(video games) Indicates a power-up or collectible item.

(video games, tabletop games) The symbol for a fictional in-game currency; victory points.

(video games, uncommon) A difficulty rating, with more stars indicating a higher level of difficulty.


(computing) The Command key on Apple Macintosh computer keyboards.


(computing) symbol for the backspace key.


(computing) Used as a visual representation of the control character “start of heading”.


(computing) Used as a visual representation of the control character "start of text".


(computing) Used as a visual representation of the control character "end of text".


(computing) Used as a visual representation of the control character “acknowledge”.


(computing) Used as a visual representation of the control character “end of transmission”.


(computing) Used as a visual representation of the bell character.


(computing) Used as a visual representation of the control character “backspace”.


(computing) Used as a visual representation of the control character "enquiry".


(computing) Used as a visual representation of the control character "carriage return".


(computing) Used as a visual representation of the control character “horizontal tabulation”.


(computing) Used as a visual representation of the control character “form feed”.


(computing) Used as a visual representation of the control character "shift out".


(computing) Used as a visual representation of the control character "data link escape".


(computing) Used as a visual representation of the control character "shift in".


(computing) Used as a visual representation of the control character "device control one".


(computing) Used as a visual representation of the control character "device control four".


(computing) Used as a visual representation of the control character "end of transmission block".


(computing) Used as a visual representation of the control character "cancel".


(computing) Used as a visual representation of the control character "substitute".


(computing) Used as a visual representation of the control character "end of medium".


(computing) Used as a visual representation of the control character "file separator".


(computing) Used as a visual representation of the control character "negative acknowledge".


(computing) Used as a visual representation of the control character "record separator".


(computing) Used as a visual representation of the control character "escape".


(computing) Used as a visual representation of the control character "newline".


(computing) Used as a visual representation of the control character "space".


(computing, dated) ISO 2047 symbol for Substitute Character


(computing, dated) ISO 2047 symbol for Delete


(computing) Used as a visual representation of the control character "unit separator".


(computing, typography) An explicit space, as opposed to a tab character, or nothing at all.


(computing) Used as a visual representation of the control character "delete".


(computing) Used as a visual representation of the control character “line feed”.


(computing) Used as a visual representation of the control character "group separator".


(computing) Used as a visual representation of the control character "synchronous idle".


(computing) Used as a visual representation of the control character “vertical tabulation”.


(computing, dated) ISO 2047 symbol for End of Transmission


(computing, dated) ISO 2047 symbol for Negative Acknowledge


Go to File → Save As → CSV file → OK.

(computing, text-style only) Indicates a series of steps to achieve a task in software.

(computing) The right-arrow key on a computer keyboard, used for navigation and various keyboard commands.


(computing) Used as a visual representation of the control character "device control two".


(computing) Used as a visual representation of the control character "device control three".


(computing, dated) ISO 2047 symbol for Synchronization


.me

. + ISO 3166-1 country code for Montenegro, ME.

The ccTLD for Montenegro as assigned by the IANA.


(mathematics, computer science) Kleene plus


(computing) The left-arrow key on a computer keyboard, used for navigation and various keyboard commands.

(mathematics, computer science) assignment


(computing) The enter key or the newline character.


ETH

The sale documents said that once the Ethereum blockchain launched and the premined ether was issued, miners would generate new ether initially at an annual rate of 26% of the amount of ether issued in the crowdsale – the issuance rate isn’t fixed and is capped at 18 million ETH minted per year.

2020 November 7, Camila Russo, “Sale of the Century: The Inside Story of Ethereum's 2014 Premine”, in CoinDesk:

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Ether.


MNG

(computing) Multiple-image Network Graphics (a raster image file format, designed to succeed multi-image static GIF (GIF 87b))


(computing, dated) ISO 2047 symbol for Bell


(computing) print screen (a command to capture the screen display as an image)


^O

(computing) The ASCII control character shift in in caret notation.


^F

(computing) The ASCII control character acknowledgement in caret notation.


(computing) The ASCII control character null in caret notation.


^E

(computing) The ASCII control character enquiry in caret notation.


^G

(computing) The ASCII control character bell in caret notation.


^D

(computing) The ASCII control character end of transmission in caret notation.


^M

(computing) The ASCII control character carriage return in caret notation.


^A

(computing) The ASCII control character start of header in caret notation.


^K

(computing) The ASCII control character vertical tab in caret notation.


^I

(computing) The ASCII control character horizontal tab in caret notation.


^U

(computing) The ASCII control character negative acknowledgement in caret notation.


^T

(computing) The ASCII control character device control 4 in caret notation.


^L

(computing) The ASCII control character form feed in caret notation.


^S

(computing) The ASCII control character device control 3 in caret notation.


^B

(computing) The ASCII control character start of text in caret notation.


^C

(computing) The ASCII control character end of text in caret notation.


^P

data link escape
data link escape#English

(computing) The ASCII control character data link escape in caret notation.


^V

(computing) The ASCII control character synchronous idle in caret notation.


^X

(computing) The ASCII control character cancel in caret notation.


^R

(computing) The ASCII control character device control 2 in caret notation.


^Q

(computing) The ASCII control character device control 1 in caret notation.


^J

(computing) The ASCII control character line feed in caret notation.


^Z

(computing) The ASCII control character substitute in caret notation.


^Y

(computing) The ASCII control character end of medium in caret notation.


^N

(computing) The ASCII control character shift out in caret notation.


`lowbar`

head

`lowbar` (English symbol name underscore or underline)

`lowbar` (canonical)
underscore (English name symbol)
underline (English name symbol)

MS-DOS prompt: C:\>_

] [
Unsupported titles/Space#Translingual

visual display unit
visual display unit#English

(computing) Used to represent what would normally be a space ] [ in computing.

Used as a cursor to indicate a place where text can be typed. On visual display units, the underscore may be made to blink.

(programming) Especially as a prefix: used to denote a special identifier such as a global or private variable or a reserved symbol.

My email address is jon_smith@example.com.


`num`

`num` (English symbol name number sign or hash or pound sign or octothorpe)

`num` (canonical)
number sign (English name symbol)
hash (English name symbol)
pound sign (English name symbol)
octothorpe (English name symbol)

(Internet) A hashtag, which is a metadata tag for use in microblogging and social network services, used to label and search content.

(mathematics, computer science) Used to indicate string concatenation.


`vert`

`vert` (English symbol name vertical bar or vertical line or pipe)

`vert` (canonical)
vertical bar (English name symbol)
vertical line (English name symbol)
pipe (English name symbol)

(programming) Used in some programming languages as the "bitwise or" operator.

abc|def matches "abc" or "def".

(regular expressions) Metacharacter that matches either the expression before or the expression after.

| Thanks, Barry. I was able to achieve run time linking by using your example as
| a model, although, 1) I don't entirely understand the use of typedef, etc.,
| and,
1) From the viewpoint of just occasional user of C(++): I think that syntax of pointers-to-functions is just plain ugly, tough to remember and tough to comprehend.

2003 January 21, Jugoslav Dujic, “Re: Using common DLL routines...”, in comp.os.ms-windows.programmer.win32 (Usenet; in English):

(Internet, rare) Used in email, Usenet, and some forums to indent the quoted message being replied to.


`gt`

Go to File > Save As > CSV file > OK

(computing) Synonym of → (“indicates a series of steps to achieve a task in software”)

c:\users\home\> (Command Prompt in Microsoft Windows)

(computing) Indicates that the user is being prompted for input.

>> What is your favorite ice cream flavor?
> Mine's strawberry.
I prefer chocolate.

(Internet) Used in email, Usenet, Markdown and some forums to indent the quoted message being replied to, or in plaintext to mimic this usage.


A simplification of the punctus elevatus, ⟨⹎⟩.

C: is the default system drive on Windows.

(computing) Indicates a storage or media drive letter (with or without path).

(networking) Separates the parts of an IPv6 address.

(Internet) Represents two eyes vertically aligned, in order to form emoticons.


`period`

The periodos of Aristophanes of Byzantium, ca. 200 BCE. Originally there were three dots: ⟨·⟩ at mid height (the comma), ⟨.⟩ at the baseline (the colon), and ⟨˙⟩ at capital height (the periodos). When minuscule writing became common, it proved difficult to make a three-way height distinction, and only the periodos was retained, though it shifted to the baseline.

point.x

the ‘x’ property of the ‘point’ variable

In various programming languages, the structure access operator.

echo 'I am currently ' . myAge(1981) . ' old.';

In various programming languages, the string concatenation operator.

ls .

list the contents of the current directory

In various operating systems, the current directory.

div.quotedtext {font-style: italic}

The class selector in CSS, which intends to format a class of an element. (A class can appear freely one or more times in a page, as opposed to the ID selector: #).

document.txt

the file with the base name ‘document’ and the extension ‘txt’

Separates a file name from its extension.

en.wiktionary.org

the Internet domain name with components ‘en’, ‘wiktionary’, and ‘org’

top-level domain
top-level domain#English

Separates the parts of the domain name of a website (including the subdomain and the top-level domain).

version 1.2.16

Separates the parts of a version number.

Separates the parts of an IP address (IPv4).

(regular expressions) Matches any single character.

.@Tim needs to fix this problem ASAP

(chat rooms, Twitter) Used to prefix a message to prevent it from being treated as a command.

chat rooms; Twitter; chat rooms; Twitter


(programming) A namespace or scope resolution operator in some programming languages.

2001:db8::ff00:42:8329 = 2001:0db8:0000:0000:0000:ff00:0042:8329

1 = 0000:0000:0000:0000:0000:0000:0000:0001

(networking) Contracted notation of an IPv6 address which contains consecutive zeros in between colons.


`lt``gt`

(mathematics, programming) Not equal to.


(computing, programming) Assignment. Indicates the that the value or computed expression on the right is to be stored in the variable or address location on the left.


ά

electrical engineering
electrical engineering

(electrical engineering) Temperature coefficient of resistance.


(engineering, physics) The mho (unit of conductance)


ℰ

(mathematics, computer science) A level of the Grzegorczyk hierarchy


.bl

. + ISO 3166-1 country code for Saint Barthélemy, bl

The ccTLD for Saint Barthélemy as assigned by the IANA.


(technology, Internet) The first version of something.


(technology, Internet) The second version of something.


A Copy Items box is displayed. Expand the My Computer folder, if necessary, and then click on 💾 3½ Floppy (A:).

2004, Cia Training Ltd Staff, E-Quals Unit 021 It Principles Level 2 (in English), CIA Training Ltd., →ISBN, page 62:

(graphical user interface) A floppy disk.

7. Click 💾
Your change to the memo is saved.

2013, Jennifer Duffy, Carol Cram, Microsoft Word 2013: Illustrated Complete (in English), Cengage Learning, →ISBN, page 8:

(graphical user interface) An icon that represents saving digital data to any storage medium.


R-

* (stereochemistry): Abbreviation of Latin rectus (“right”)

chemical engineering
chemical engineering

(chemical engineering) the prefix indicating a codified refigerant


(programming) Increment by 1 (in certain programming languages such as C and Java).


Vss

field-effect transistor
field-effect transistor

(electronics) voltage source source — a terminal on an FET (field-effect transistor) circuit (in an nMOS MOSFET, this is used as the drain, connected to ground)


JNG

(computing) JPEG Network Graphics (a raster image file format, using JPEG compression, with the file structure of PNG)


APNG

(computing) Animated Portable Network Graphics; a file format for animated multi-image raster graphics with lossless compression designed to replace Netscape GIF 89b format, based on the PNG file format


.cat

The sponsored top-level domain for Catalonia and the Catalan language.


.xxx

(Internet) An Internet top-level domain intended for adult and pornographic content.


(computing) The down-arrow key on a computer keyboard, used for navigation and various keyboard commands.


.coop

(Internet) An Internet top-level domain for use by cooperatives and similar organisations.


.mobi

(Internet) An Internet top-level domain intended to be used for websites tailored for display on mobile devices (rather than traditional desktop computers).


.tel

(Internet) An Internet top-level domain intended to be used for Internet communications services.


Originated in the notation for hexadecimal numbers in the C programming language (first major revision described in The C Programming Language, published 1978) and its descendants.

Available RAM using ARMulator or Evaluator-7T extends from 0x8000 to 0xffff while that using the LPC2102 with the Keil tools is from 0x40000000 to 0x40000fff.

2007, J. R. Gibson, ARM Assembly Language - an Introduction (in English), page 106:

(computing) Indicates that the number that follows is in hexadecimal.


.travel

(Internet) An Internet top-level domain intended to be used for websites related to travel.


.pro

(Internet) An Internet top-level domain intended to be used by professionals.


.asia

(Internet) An Internet top-level domain intended for use by people and organisations in Asia, Australia, and the Pacific.


.arpa

Originally an acronym for Advanced Research Projects Agency; now said to stand for Address and Routing Parameter Area.

(Internet) An Internet top-level domain used exclusively for technical infrastructure purposes.


.nato

(Internet, historical) A former Internet top-level domain intended for the use of the North Atlantic Treaty Organization, later superseded by .int.


.aero

(Internet) An Internet top-level domain intended to be used for websites related to aviation.


.bq

. + ISO 3166-1 country code for the Caribbean Netherlands, bq.

Caribbean Netherlands
Caribbean Netherlands

The ccTLD for the Caribbean Netherlands as assigned by the IANA.


(telecommunications): From entry 73 in the Phillips Code, originally a list from 1 to 92 of numeric codes used to abbreviate common phrases used on telegraph lines.

(telecommunications) regards, best regards (a valediction among ham radio enthusiasts).


The bottom arrow pointing right is the rightward tab; the top arrow pointing left is the leftward tab, or "shift+tab" which may serve to reverse the role of tab in some programs.

⇆Tab to Move Down to Notes Button

(computing) The tab (tabulation) symbol found in keyboards.


(databases) A primary key. (a column able to identify every row in the table)


(graphical user interface) A briefcase in Microsoft Windows, which is a folder able to synchronize files with another folder.


Death; died; dying; deceased; mortality.

(Internet slang, video games) Kills; to kill; murder.


(graphical user interface) an icon which converts speech into text


䘬

Han char

䘬 (Kangxi radical 145, 衣+6, 12 strokes, cangjie input 中戈十 (LIJ), composition ⿰衤戎)


䤴

䤴 (Kangxi radical 167, 金+8, 16 strokes, cangjie input 金山弓水 (CUNE), composition ⿰釒函)


䥁

䥁 (Kangxi radical 167, 金+10, 18 strokes, cangjie input 金弓戈田 (CNIW), composition ⿰釒圅)


NMC

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Namecoin.


(computer science) blank symbol, used in Turing machine diagrams


(a) (rare) egressive airstream mechanism when used with a letter for an ingressive sound, e.g. [ʘ↑]

(b) exhalation when used alone, [↑].

(number theory, computer science) exponentiation

(computing) The up-arrow key on a computer keyboard, used for navigation and various keyboard commands.


PPC

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Peercoin.


artificial intelligence
artificial intelligence#Noun

(neologism, technology) Used in applications relating to generative artificial intelligence.


From the first letter of Spanish petro, from petróleo. Coincidentally similar in form to the ruble symbol.

A currency sign representing the petro, a cryptocurrency launched in Venezuela.


(computing) Unofficial symbol for the Windows Key because of its resemblance to the Windows logo, and is nearly identical to the Windows 11 logo.


(computing, dated) ISO 2047 symbol for Data Link Escape


(computing, dated) ISO 2047 symbol for Enquiry


RGSS

(video games) Initialism of Ruby Game Scripting System. (an RPG scripting language used to create computer RPGs)


.cw

. + ISO 3166-1 country code for Curaçao, CW, used because CA, CR, CC, and CO were unavailable.

The ccTLD for Curaçao as assigned by the IANA.


DTIME

(computer science) A class of problems solvable by a deterministic Turing machine in given asymptotic time.


(computer science) modified subtraction, cutoff subtraction: a binary operator which evaluates to the difference between its operands if it is non-negative, and to 0 otherwise


DSPACE

(computer science) A class of problems solvable by a deterministic Turing machine in a given asymptotic amount of space.


MSO

(logic, computer science) Monadic second-order logic.


(computing) adjustable in horizontal direction


From SAT and 3, the number of literals per clause.

conjunctive normal form
conjunctive normal form

(computing theory) The decision problem of deciding whether a given Boolean formula in conjunctive normal form with three literals per clause is satisfiable. A famous NP-complete problem.


From SAT and 2, the number of literals per clause.

(computing theory) The decision problem of deciding whether a given Boolean formula in conjunctive normal form with two literals per clause is satisfiable.


TQBF

From English True (or totally) quantified Boolean formula.

∃x_1∀x_2∃x_3...Q_nx_nf(x_1,x_2,x_3,...,x_n)

Where Q_n is ∀ if n is even and ∃ if n is odd.

(computing theory) The decision problem of, given a Boolean function f on n variables, deciding whether the following formula is satisfiable:


ಠ益ಠ

Created using the Kannada letter ಠ (ṭha) to represent an eye with eyebrow and the Chinese character 益 (“benefit, gain, profit”) to represent a furrowed brow and a snarling mouth with bared teeth.

An emoticon representing a face snarling in anger.


''1'' is text; 1 without quotation marks is a number.

(programming) Encloses a string literal in some programming languages.

Straight single quotation mark and apostrophe


Curved single quotation marks and apostrophes

"1" is text, 1 without quotation marks is a number.

(programming) Encloses a string literal in some programming and markup languages.

Search for "heads or tails" for the exact phrase. If you forget the quotation marks, you'll surely see results with "heads" and "tails" separately.

(computing) In some search engines, searches for the exact word of phrase.


1999 March 21, Raymond McKeithen II, “Re: Super GT is NOT coming to DC...” rec.games.video.sega, Usenet

I tried to find this sort of information in some of the reviews of DC SR2, but /every/ one I've read (fansites and professional) was written from the graphics-whore-viewpoint, and didn't talk much about such "nonessential" things as gameplay or car selection and handling.

Yes, you /can/ win by sitting in the wheels consistently and never doing any work. But it isn't admirable.

2010, "Simon Brooke", Re: SPOILER (stage 8) - days when you wish the stage was 5k longer.... (on newsgroup uk.rec.cycling.moderated)

(Internet, text messaging) Encloses text that should be taken as italicized; generally used in contexts where true italics are unavailable.


`lcub` `rcub`

head

{ } (English symbol name curly brackets or braces)

curly bracket s (English name symbol)
braces (English name symbol)

doSomethingTwice () { return doSomething () + doSomething () }

(programming) Used in some programming languages, especially C-type languages.

if (x>4) { result = "congratulations!" }


([abc])([def]) — \2 matches the 2nd subexpression

(regular expressions) Defines a marked subexpression, to be matched using the backslash (\1, \2, etc.)

getSum (a, b)

result = a + b

return result

(programming) Used when defining a new function, enclosing the list of parameters.

result = getFirstNumber() + getSecondNumber() + getThirdNumber()

(programming) Used when calling an existing function, enclosing the list of arguments.

if (x > 7) then printf "success!" end

(programming) Used with some expressions and conditionals, like "if", "switch", "for", "while", etc., in certain programming languages.


`lsqb` `rsqb`

DROP TABLE tbl_name [, tbl_name] ...

(computing, programming) Encloses optional parameters in syntax help.


`lsqb` `rsqb`

t[1] = "one"

t[2] = "two"

(programming) In a number of programming languages, used as the array index operator, the subscript operator.

[a-ce] matches "a", "b", "c", or "e"

(regular expressions) Matches a single character that is contained within the brackets, including ranges.


XBT

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Bitcoin.


BTC

“I’ve sold 24 collars, 13 leashes and 1 pair of ‘Disco Knickers’ with Bitcoin over the last few months,” she wrote in an e-mail. “The first order I had was for 42 BTC, which was worth about $40 at the time, but now those coins would be worth around $680! Originally I had a fixed Bitcoin price, but now I do a conversion based on the exchange rate.”

2011 July 3, Noam Cohen, “Speed Bumps on the Road to Virtual Cash”, in The New York Times:

BTC traded above $97,500 in early Asian hours, less than 3% from a landmark $100,000 figure that would push it above a $2 trillion market capitalization.

2024 November 21, Shaurya Malwa, “Bitcoin Crosses $97K, Continuing Wild ‘Trump Trade’ Rally”, in CoinDesk:


(computing, dated) ISO 2047 symbol for Start of Heading


(computing, dated) ISO 2047 symbol for End of Text


`num` `num`

Happy birthday to you. #

(television) Encloses subtitled text that is sung or in a singsong intonation.


int x = random() // Defines x as a random number.

(programming) Begins a comment that is only applicable in the current line in some programming languages.

(networking) Indicates root path in a computer network (usually followed by a node name or an IP address).

(Internet, Hong Kong) Denotes that the following paragraph is a quotation.


Introduced by the B programming language, which used the symbol "=" for variable assignment. The reasoning given by the creators of the language is that assignment is more frequent than equality testing, and thus deserves the shorter operator. The syntax was inherited by its successor C, and later adopted more widely. See wikipedia:Relational operator#Confusion with assignment operators.

if x==1 then print "success!" end (prints "success!" if x equals 1)

(programming) In some programming languages, an operator that compares if two values are equal.


(computing) adjustable in vertical direction


`lt` `gt` `lt`/ `gt`

<p>This is a new paragraph.'''

[written by Mark Zuckerberg at the start of the movie, after he was dumped by his girlfriend Erica]

<p><i>9:48pm'. The truth is that she has a nice face. I need to do something to take my mind off her. Easy enough, except I need an idea.'

(computing) Used in HTML and XML to open and close an element.


.onion

From . (“dot, as used in other domains such as .com and .net”) + English onion, by analogy with the many layers of the vegetable.

(Internet) An Internet top-level domain (not official, i.e., not part of the Domain Name System) for sites accessible via the Tor network.


(programming) Encloses a multi-line comment in some programming, markup and query languages.


`lt`!-- --`gt`

<!-- Note: I don't understand how this code works. -->

(computing) Encloses a multi-line comment in some markup languages, including HTML, XML, and SGML.


= non-breaking space

(computing) Encloses a character entity reference, which is displayed as a certain character in HTML and XML.


(programming) In some programming languages, a comparison operator that returns true if two values are equal and have the same data type.


`lt` `gt`

To: Jane Doe <janedoe@example.com>, Joe Bananas <bananas1989@example.com>

Buy stuff from Best Shop <http://bestshop.example.com>.

See, eg, the Agreement between the United Nations and the Government of the Republic of Benin concerning the status of the United Nations Multidimensional Integrated Stabilization Mission in Mali (MINUSMA) in the territory of the Republic of Benin (8 February 2017) available at <https://treaties.un.org>; and the Exchange of letters constituting an agreement between the United Nations and the Government of the Republic of the Niger concerning the activities carried out in the Republic of the Niger by the United Nations Multidimensional Integrated Stabilization Mission in Mali (MINUSMA) (24 January 2017) available at <https://treaties.un.org>.

2019, Stephen Mathias, “Treaty-Making at the United Nations: The View from the Secretariat”, in Simon Chesterman, David M. Malone, Santiago Villalpando, Alexandra Ivanovic, editors, The Oxford Handbook of United Nations Treaties (in English), Oxford University Press, →ISBN, part I (Evolution—UN Treaty-Making in Practice and in Theory), chapter section 7 (Other Treaty-Related Activities of the Secretariat), page 66:

(Internet) Encloses an e-mail address or web address.


`lt` `gt`

{{#tag:syntaxhighlight|#include |inline="True"|lang="c"|style="white-space:pre-wrap;"}} – C example

{{#tag:syntaxhighlight|ArrayList|inline="True"|lang="Java"|style="white-space:pre-wrap;"}} – Java example

(programming) Encloses certain types of information in some programming languages.

{{#tag:syntaxhighlight||inline="True"|lang="html"|style="white-space:pre-wrap;"}} = displays an image

{{#tag:syntaxhighlight|
|inline="True"|lang="html"|style="white-space:pre-wrap;"}} = a line break

Unsupported titles/Less than trailing slash greater than#Translingual

(computing) Encloses certain tags in markup languages.

(computing) Encloses a standalone HTML tag. Compare < /> in XML.

Unsupported titles/HTML start tag end tag#Translingual

(computing) In HTML and XML, encloses a start tag that must be closed by an end tag. See < > for more information.


The output of true && false is false.

(programming) The conditional "and" operator in some programming languages.


`lt` /`gt`

<br/>

Unsupported titles/Enclosing less than greater than

(computing) Encloses a standalone XML tag. Compare < >.


(programming) The inequality operator (compare ≠, !=, <>) in some programming languages, including Lua and MATLAB.


Start Graph by choosing Insert ⇨ Object to display the Object dialog box, choosing Microsoft Graph Chart from the Create New Tab, and then clicking OK.

2003, David Angell, Peter Kent, Word 2003 Bible (in English), John Wiley & Sons, →ISBN, page 553:

(computing) Alternative form of → (“indicates a series of steps to achieve a task in software”)


A currency sign representing bitcoin, an electronic currency.


-`gt`

(programming) Arrow operator. Used to access class, structure or union members using a pointer.


ok_hand: = 👌

(Internet) In some social networks and forums, generates an emoji.


The 🗕 button collapses a window into the taskbar.

2006, Steve Rickaby, Pass ECDL in 30 Steps (in English), Cengage Learning EMEA, →ISBN, page 92:

(graphical user interface) Used as an icon to minimize a window.


The 🗗 button restores a window to its original size after 🗖 is used.

(graphical user interface) Used as an icon to cause a maximized window to be of a smaller, non-maximized size, possibly overlapping other windows if they exist.


The 🗖 button expands a window so that it fills the whole screen.

(graphical user interface) Used as an icon to maximize a window.


(graphical user interface) Used as an icon to close an application window.


Visual rendering of Morse code abbreviation 88 (“love and kisses”).


kBd

(computing) Symbol for kilobaud, a unit of data transfer rate equal to 10³ baud.


(graphical user interface) An icon to create a new (blank) file or document.


Designed after the physical buttons used on older radios to select preset stations – when one of the buttons was pressed, other buttons would pop out, leaving the pressed button the only button in the "pushed in" position.

(graphical user interface, usually found on the Internet) The radio button, which usually comes in groups (sets of multiple radio buttons), each one corresponding to an exclusive option, from which only one may be chosen. When a radio button is pressed, any previously selected radio button is automatically un-selected.


(API) A recycle bin or trash folder; a place that stores deleted content.


(mathematics, computer science) no assignment


.wiki

(Internet) An Internet top-level domain intended to be used for websites which are formatted as wikis.


From 4 (“the number four”) + K (“abbreviation for thousand”).

compound

(binary computing) The cardinal number 4,096.


(binary computing) The cardinal number 2048.


(binary computing) The cardinal number 8192.


ඩ

(Internet slang, humorous) An amogus; a crewmate character from the videogame Among Us.


ඞ

The Sinhalese script velar nasal letter ṅa.


(computing, dated) ISO 2047 symbol for End of Transmission Block


(computing, dated) ISO 2047 symbol for Vertical Tabulation


(computing, dated) ISO 2047 symbol for Null


(computing, dated) ISO 2047 symbol for Device Control 2


(computing, dated) ISO 2047 symbol for Device Control 1


(computing, dated) ISO 2047 symbol for Form Feed


(computing, dated) ISO 2047 symbol for End of Medium


(computing, dated) ISO 2047 symbol for File Separator


(computing, dated) ISO 2047 symbol for Record Separator


(computing, dated) ISO 2047 symbol for Group Separator


(computing, dated) ISO 2047 symbol for Unit Separator


(computing, dated) ISO 2047 symbol for Device Control 4


(computing, dated) ISO 2047 symbol for Shift In.


(computing, dated) ISO 2047 symbol for Bell


(computing, dated) ISO 2047 symbol for Device Control 3


(electronics) A cylindrical rechargeable battery cell format for lithium-ion chemistry batteries, commonly used as component batteries in battery packs for some electronics and electric cars.


Compound of 18 + 65 + 0. From the nominal dimensions of a fresh battery: 18-millimetre diameter by 65-millimetre length. The final 0 is common to the name of many cylindrical cell batteries.


(binary computing) The cardinal number 1024.


NXT

In the meantime, in the early afternoon of November 20th, Come-From-Beyond offered to sell 1 million NXT for 1 BTC, or 100 satoshis per NXT.

2017, Daniel M. Ryan, “The Genesis”, in Robert Bold, editor, SNAPSHOT - Nxt unsurpassable blockchain solutions, 2nd edition, Lulu.com, →ISBN, page 26:

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Nxt.


From AISI and SAE standards nomenclature for iron and steel grades for carbon steels with a maximum of 1% carbon content.

(metallurgy) Identifying a steel grade with a maximum of 1% carbon.


For steels with 1% or less carbon content, 10- + "95" (0.95%) fractional portion of the percentage of carbon content.

(metallurgy) A common grade of high carbon steel (0.95% carbon) used for blades. This grade is not a stainless steel, thus knives made with it must be oiled to prevent rusting, but its properties are suitable to make functional presentation swords.


From AISI and SAE standards nomenclature for iron and steel grades for chromium steels with roughly 1% chromium.

(metallurgy) Identifying a chromium steel grade with roughly 1% chromium, and a varying amount of carbon.


For chromium steels with 1% or less carbon content, and roughly 1% chromium, 51- + "60" (0.60%) fractional portion of the percentage of carbon content.

(metallurgy) A common grade of stainless steel used for blades and springs. Suitable for use in functional presentation swords.


For example, in a directed graph u ⇝ v means v is reachable from u, for vertices u and v.


ternary operator
ternary operator#English


From 0.223 English inches, the bullet diameter.


From 7.62 millimetres, the internal diameter, from the top of the lands in the barrel rifling. (the bullet calibre would be 7.82 mm (0.308")).


From 0.308 English inches, the bullet diameter.


From 5.56 millimetres, the internal diameter, from the top of the lands in the barrel rifling. (the bullet calibre would be 5.664 mm (0.223")).


.png

From English PNG, which is an initialization of the word Portable Network Graphics.


(computing) Indicates that the number that follows is in octal.


(rare, computing) Alternative form of 0b


(rare, computing) Alternative form of 0o


(rare, computing) Alternative form of 0x


.jpg

From .jpeg, modified to fit the three-letter file extension format at the time.

(computing) An extension for JPEG files.


(computing) Indicates that the number that follows is in binary.


.jpeg

From English JPEG (“Joint Photographic Experts Group”).


.gif

From English GIF, which is an initialization of Graphics Interchange Format.


.jpe

From English .jpeg, modified to fit the three-letter file extension format at the time.


(electrochemistry, electronics, electrical) Alternative form of 18650


(electrochemistry, electronics, electrical) Alternative form of 4680


Compound of 46 + 80. From the dimensions of the electrochemical cell package, 46-millimetres in diameter and 80-millimeters tall.

(electronics) A cylindrical rechargeable battery cell format for lithium-ion chemistry batteries.


From the trademark "NE2000", from the Novell product. From k/K being the symbolic abbreviation of 1000.

(computing, telecommunications, countable) An ethernet network card compatible with the Novell NE2000

(computing, telecommunications, uncountable) A defacto industry standard for ethernet network cards, which implement compatibility with the Novell NE2000


From the trademark "NE1000", from the Novell product. From k/K being the symbolic abbreviation of 1000.

(computing, telecommunications, countable) An ethernet network card compatible with the Novell NE1000

(computing, telecommunications, uncountable) A defacto industry standard for ethernet network cards, which implement compatibility with the Novell NE1000


DOGE

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Dogecoin.


XRP

(cryptocurrencies) A cryptocurrency issued by Ripple Labs.


XRP

XRP traded above 82 cents in early Asian trading hours Friday, extending 7-day gains to 50% as it reached levels last seen in June 2023. The jump came as 18 U.S. states filed to sue the SEC and commissioners, including chairman Gary Gensler, accusing them of unconstitutional overreach of the crypto industry.

2024 November 14, Shaurya Malwa, “XRP Jumps 17%, Outperforms Rest of the Market as Rally Cools; Trader Thinks $120K Bitcoin Target Still in Play”, in CoinDesk:

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency XRP.


O (halo) + : (eyes) + - (nose) + ) (smiling mouth).

(Internet) An emoticon representing an angel or saint.


Denotes a position to write or sign, for example on an e-document.


.fr

. + ISO 3166-1 (alpha-2) country code for France, FR.

The ccTLD for France as assigned by the IANA.


.mng

From English MNG, which is an initialization of the word Multiple-image Network Graphics.


.jng

From English JNG, which is an initialization of the word JPEG Network Graphics.


FODG

From FODG, which is an initialization of the term Flat XML ODF Graphics.

(computing) An ODF extension for graphics files.


FODP

From FODP, which is an initialization of the term Flat XML ODF Presentations.

(computing) An ODF extension for presentation files.


FODS

From FODS, which is an initialization of the term Flat XML ODF Spreadsheets.

(computing) An ODF extension for spreadsheet files.


FODT

From FODT, which is an initialization of the term Flat XML ODF Text Documents.

(computing) An ODF extension for text or word processing files.


Flipping tables (or (╯°□°)╯︵ ┻━┻ for net natives) is a classic among online emoji, and happens to be one of our favorites.

2014 June 3, Kwame Opam, “Watch this supercut of every table flip in movie history”, in The Verge:

2014 September 22, "Soos and the Real Girl", season 2, episode 5 of Gravity Falls
Cashier: And there's a note on it that says destroy at all costs.
Note on the video game box: DESTROY AT ALL COSTS!! (╯°□°)╯︵ ┻━┻

The name alone could be anything from valid values ("hotdog" or "pretzel") to invalid values ("samosa", "kimchi", or "poutine") to absurd ("12345", "", or "(╯°□°)╯( ┻━┻").

2021 July 21, Patrick Viafore, Robust Python, O'Reilly Media, →ISBN, page 54:

An emoticon representing a person flipping a table in rage.


DASH

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Dash.


head

` (English name backtick or backquote or backprime)

backtick (English name)
backquote (English name)
backprime (English name)

(dated, computing) Alternative form of ‘ (quotation mark)

The echo and sed commands appear within backprimes (`) that indicate command substitution: The result of executing the commands within the backprimes replaces the backprimes and everything between them.

1997, Mark G. Sobell, “The TC Shell”, in A Practical Guide to Linux, Reading, MA: Addison-Wesley, →ISBN, page 440:

(computing) Used as an enclosing construct in some programming languages

(nonstandard, Internet) Alternative form of ' (apostrophe)


XVG

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Verge.


XPM

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Primecoin.


USDT

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Tether.


USDC

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency USD Coin.


TRX

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Tron.


AVAX

(cryptocurrencies) A cryptocurrency on the Avalanche blockchain platform.


AVAX

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency AVAX.


DAI

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Dai.


XMR

Monero es la sexta moneda digital con mayor capitalización del mercado. A día de hoy circulan más de 14 millones de unidades monetarias XMR, y el precio actual de 1 XMR es de $21,47.

2017, Anastasiia Zemlianskaia, La tecnología blockchain como palanca de cambio del sector financiero y bancario (thesis; in Spanish), University of Seville, page 26:

La rapidità di formazione dei blocchi viene portata a 60 secondi; la velocità diemissione di moneta è rallentata del 50%, con un limite asintotico di 18,132 milioni di XMR.

2019–2020, Francesco D'Agostino, Strategie di diversificazione nelle criptovalute (thesis; in Italian), Luiss Guido Carli, page 19:

Monero is untraceable; that is, the transactions recorded on the blockchain cannot be linked to any particular user, and also exchangeable (fungible): 1 XMR is functionally identical to any other 1 XMR.

2020, B. V. de Melo Mendes, A. F. Carneiro, “A comprehensive statistical analysis of the six major crypto-currencies from August 2015 through June 2020”, in Journal of Risk and Financial Management, volume 13, number 9 (in English), Multidisciplinary Digital Publishing Institute, →DOI:

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Monero.


BNB

(international standards) Unofficial non-ISO 4217 currency code for the cryptocurrency Binance Coin.


(computing) Separates characters that each bear ruby characters.


(computing) Marks the beginning of a block of ruby text.


²³⁸U

(physics) The chemical symbol for uranium-238, the most common isotope of uranium.


²³⁵U

(physics) The chemical formula for the uranium isotope uranium-235, which is used in nuclear fission.


( ͡° ͜ʖ ͡°)

( ͡° ͜ʖ ͡°) (English symbol name Lenny Face)

First attested in an anonymous comment on 18 November 2012 in a thread about spam filter settings on the Finnish imageboard Ylilauta: "( ͡° ͜ʖ ͡°) 'this thread is leaking from the heavens'". On the same day, the emoticon was posted on several social media websites including 4chan, Reddit and YouTube.

3. Nahhhh, one more won’t hurt ( ͡° ͜ʖ ͡°) / *continues watching the twentieth consecutive episode of Parks and Rec (plz, you can’t blame me—it started playing by itself)*

2021 October 12, Golshan Sharbatdar Alaei, “The 3 thoughts that cycle through my head every time I see my face when the screen goes dark at the end of a Netflix episode”, in The Strand, volume 64, number 4, Toronto: Victoria University, page 15:

A kaomoji-style emoticon, often called Lenny Face, mostly used to suggest mischief, imply sexual innuendo or a second hidden meaning behind a sentence, or pasted over and over to spam online discussions.


(Hong Kong, Internet) Encloses a quotation of paragraph length.


`gt``gt``gt`

Alternative form: ⋙

(programming) The right shift operator in some programming languages.


`lt``lt`

Alternative form: ≪

(programming) The left shift operator in some programming languages.


`lt``lt``lt`

Alternative form: ⋘


`gt``gt`

Alternative form: ≫


[🔎 appears to the left of the search box.]

(graphical user interface) An icon to search something.

(graphical user interface) An icon to zoom in or enlarge content.


[This system-wide desktop search feature for macOS and iOS uses a left-leaning magnifying glass as its search icon.]

You can also use the Search function (🔍) to look for interesting events or places with their associated teleport links, maps, and information.

2022 December 5, Julian Chen, Second Life as a Virtual Playground for Language Education: A Practical Guide for Teaching and Research (in English), Taylor & Francis, →ISBN, unnumbered page:


(graphical user interface) Represents a user profile or contact.


(graphical user interface) Represents multiple user profiles or contacts.


(graphical user interface, Internet) A shopping cart or basket.


(凸ಠ益ಠ)凸

An emoticon representing a furious face accompanied by two middle fingers.


work in progress
work in progress#English

(Internet) A symbol indicating a work in progress.


(graphical user interface) An icon that indicates the battery percentage of a computer or mobile device.


(graphical user interface, Internet slang) To pin. (“To attach (an icon, application, message etc.) to another item so that it persists.”)


Coordinate term: 🔅

(computing) An icon that increases the brightness of a screen.


Coordinate term: 🔆

(computing) An icon that decreases the brightness of a screen.


\n

From the escape sequence used in the C programming language and its numerous derivatives.

(programming) A representation of the newline character.


\r

(programming) A representation of the carriage return character.


\t

(programming) A representation of the tab character.


\b

(programming) A representation of the backspace character.


\f

(programming) A representation of the form feed character.


\a

From the escape sequence used in the C programming language and its numerous derivatives; from \ (escape character) + an initialism of alert.

(programming) A representation of the bell character.


\v

(programming) A representation of the vertical tab character.


Alternative form: \000

(programming) A representation of the null character.


In the Settings app, tap the switch next to Airplane Mode. You see an airplane ✈ icon in the top status bar when the mode is active. (When you turn the mode on or off, the airplane ✈ icon cutely flies in or out.)

2023 September 18, Glenn Fleishman, “Manage Airplane Mode”, in Take Control of iOS & iPadOS Privacy and Security, 4 edition (in English), alt concepts^([sic]), →ISBN:

(graphical user interface) Airplane mode.


On iOS's e-mail client, unread e-mails are marked with 🔵 at the top left fronting the subject title.

On Telegram, unread messages are denoted with 🔵 at their right.

(computing, social media) An unread notification, message or e-mail.

(video games) Something that can be interacted with.


🟡 Single-click the yellow button to minimize the window, which sends a tiny icon down into the Dock, on the right side.

2010, Robin Williams, John Tollett, Mac OS X 10.6 Snow Leopard (in English), Peachpit Press, →ISBN, page 9:

(graphical user interface) On Apple Mac computers, a button that when pressed minimises a window.

(graphical user interface, social media) AFK; idle; inactive.


(graphical user interface, mobile telephony) On iPhones and iPadOS, indicates that the microphone is activated.


[Title]

2023 October 20, “🔴 Live: Pro-Palestinian protests erupt across Arab world as aid remains stuck at Gaza border”, in France24 (in English):

A red Record light alerts both participants that recording is in progress.

2010, Robin Williams, John Tollett, Mac OS X 10.6 Snow Leopard (in English), Peachpit Press, →ISBN, page 182:

(cameras, television) Indicates a recording.

When you finish, click the Close button (the red circle in the upper-left corner) to simply close the Safari window or choose Safari⇒Quit Safari to completely exit the application.

2012, Joe Hutsko, Barbara Boyd, Macs All-in-One For Dummies (in English), Wiley, →ISBN, unnumbered page:

(technology) A button to exit, close or delete something.

A fully red circle indicates that you're likely to see a problem in the specific browser. For example, the Internet Explorer problem related to links, lists, and the display property mentioned previously is nearly a sure thing.

2008, David Sawyer McFarland, Dreamweaver CS4: The Missing Manual (in English), O'Reilly Media, →ISBN, page 132:

(technology) An error or invalid action; incomplete.

(graphical user interface, proscribed) A button that when pressed displays the previous page.

The red dot on your Apple Watch is a signal that shows you have unread notifications. These can be anything from calls and texts to push notifications from apps, like somebody liking your post on Facebook or requesting to follow you on Instagram.

2023 January 10, Sarah Vincent, “What Is That Red Dot on Your Apple Watch—and How Do You Get Rid of It?”, in Reader's Digest (in English):

(graphical user interface, social media) An unread notification.

[On this freeware chat application, a 🔴 will appear below a user's profile picture if they set their status to the "do not disturb" option.]

2024 December 15, “Discord”, in Discord Inc. (in Translingual):

Image from Metal Gear Solid, with Solid Snake as ⚪ and his enemies represented by multiple 🔴.

2014, James Paul Gee, Unified Discourse Analysis: Language, Reality, Virtual Worlds and Video Games (in English), Taylor & Francis, →ISBN, page 40:

(video games) Indicates an enemy or target.

(video games) Indicates an objective or goal.


(computing, Internet) Indicates an action has occurred; success, completed.

(graphical user interface) A button that when pressed opens a page or webpage; or, enables full screen mode.

(graphical user interface, social media) Online; active; available.

(graphical user interface, mobile telephony) On iPhones and iPadOS, indicates that the camera is enabled.

(video games, appears at the top of an entity) Indicates a teammate, ally or friendly NPC, such as one that posses a quest for the player.


.kar

The KDE MIDI/Karaoke file player allows you to play .mid and .kar files if your sound card has hardware support for raw MIDI files.

2006, Michael Jang, Mastering Red Hat Linux 9, page 529:

(computing) An extension for MIDI "karaoke" files.


🤓 (“nerd emoji”) + ☝ (“pointing upwards emoji”).
Arose around October 2022 among Latin American Twitter users in reference to an image macro.

compound

Synonym of 🤓 (“used to suggest someone is overexplaining, a pedant or nerdy”).


From the compounding of two emoji, 🗣 (speaking; shouting) + 🔥 (fire). Popularised in 2023 through social networking service TikTok.

(Internet slang) Used to indicate that one is shouting or speaking with vehemence; also, used to add emphasis to a statement or opinion.


From the compounding of two emoji, 🍷 (wine) + 🗿 (moai). Popularised in 2023 through social networking service TikTok.

(Internet slang, sometimes humorous) Indicates that something is of high intellectual value, agreeable or admirable, or sigma male-related.


From the red triangle in the Palestinian flag, held hoist-up.

2023 Israel–Hamas war
w:2023 Israel–Hamas war

(social media, politics) indicates support for Palestine or for Hamas in the ongoing 2023 Israel–Hamas war


n**2 = n² = n × n


From the fact that the C programming language states that a character escape sequence may consist of a maximum of three octal digits; if the shorter sequence \0 is followed by an octal digit which is intended to represent the next character, then \000 is required to prevent that digit from being interpreted as part of the escape sequence instead. For example, \0 followed by 1 would be interpreted as the escape sequence \01, whereas \0001 is interpreted as \000 followed by the digit 1.

(programming) Alternative form of \0 (null character).


graphical user interface
graphical user interface

(graphical user interface) Used as an icon for a text file.


Rathalos

Direct borrowing from English Rathalos (“dragon species from the Monster Hunter video game series”), possibly a faux word related to English wrath.

bor

A taxonomic genus within the subfamily Anyphaeninae – a genus of anyphaenid sac spiders.


Chilicola charizard

Chilicola + English Charizard (“species of Pokémon”). Charizard is a blend of char + lizard.

affix

A taxonomic species within the family Colletidae – xeromelissine bees.


(Internet, metonymically) Represents maintenance, cleanup, and administration.


🔍 Search – 👤 Profile – 📰 News – ⚙ Settings

(graphical user interface, metonymically) News.


(mobile games, Internet) Primes the user to use a pinching gesture on a touchscreen device.


(graphical user interface) An icon that when pressed takes the user to the home page.