"0x" meaning in Translingual

{
  "etymology_text": "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. Developed from an earlier #x used in BCPL, one of the ancestors of C. In BCPL, octal numbers used the # prefix (originally an underlined digit 8̲), which was changed into a preceding zero in B. B did not support hexadecimal literals, but C (which was developed from it) did by reintroducing the BCPL syntax and changing the preceding # (#x) to 0 (0x) by analogy.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
      },
      "expansion": "0x",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "mul",
          "name": "Computing",
          "orig": "mul:Computing",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              59,
              61
            ],
            [
              69,
              71
            ],
            [
              133,
              135
            ],
            [
              147,
              149
            ]
          ],
          "ref": "2007, J. R. Gibson, ARM Assembly Language - an Introduction (in English), page 106:",
          "text": "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.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Indicates that the number that follows is in hexadecimal."
      ],
      "id": "en-0x-mul-symbol-4rtJI8BE",
      "links": [
        [
          "computing",
          "computing#Noun"
        ],
        [
          "number",
          "number"
        ],
        [
          "hexadecimal",
          "hexadecimal"
        ]
      ],
      "raw_glosses": [
        "(computing) Indicates that the number that follows is in hexadecimal."
      ],
      "related": [
        {
          "alt": "binary",
          "word": "0b"
        },
        {
          "alt": "octal",
          "word": "0"
        },
        {
          "alt": "octal",
          "roman": "octal",
          "word": "0o"
        }
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "wikipedia": [
        "B (programming language)",
        "BCPL"
      ]
    }
  ],
  "word": "0x"
}

{
  "etymology_text": "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. Developed from an earlier #x used in BCPL, one of the ancestors of C. In BCPL, octal numbers used the # prefix (originally an underlined digit 8̲), which was changed into a preceding zero in B. B did not support hexadecimal literals, but C (which was developed from it) did by reintroducing the BCPL syntax and changing the preceding # (#x) to 0 (0x) by analogy.",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
      },
      "expansion": "0x",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "related": [
    {
      "alt": "binary",
      "word": "0b"
    },
    {
      "alt": "octal",
      "word": "0"
    },
    {
      "alt": "octal",
      "roman": "octal",
      "word": "0o"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned",
        "Translingual entries with incorrect language header",
        "Translingual lemmas",
        "Translingual symbols",
        "Translingual terms spelled with numbers",
        "Translingual terms with quotations",
        "mul:Computing"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              59,
              61
            ],
            [
              69,
              71
            ],
            [
              133,
              135
            ],
            [
              147,
              149
            ]
          ],
          "ref": "2007, J. R. Gibson, ARM Assembly Language - an Introduction (in English), page 106:",
          "text": "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.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Indicates that the number that follows is in hexadecimal."
      ],
      "links": [
        [
          "computing",
          "computing#Noun"
        ],
        [
          "number",
          "number"
        ],
        [
          "hexadecimal",
          "hexadecimal"
        ]
      ],
      "raw_glosses": [
        "(computing) Indicates that the number that follows is in hexadecimal."
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "wikipedia": [
        "B (programming language)",
        "BCPL"
      ]
    }
  ],
  "word": "0x"
}