"PNG" meaning in Tok Pisin

{
  "head_templates": [
    {
      "args": {
        "1": "tpi",
        "2": "proper noun"
      },
      "expansion": "PNG",
      "name": "head"
    }
  ],
  "lang": "Tok Pisin",
  "lang_code": "tpi",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Papua Niugini"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Tok Pisin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "tpi",
          "name": "Papua New Guinea",
          "orig": "tpi:Papua New Guinea",
          "parents": [
            "Melanesia",
            "Oceania",
            "Earth",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Initialism of Papua Niugini."
      ],
      "id": "en-PNG-tpi-name-Fj2ACTPl",
      "links": [
        [
          "Papua Niugini",
          "Papua Niugini#Tok_Pisin"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "PNG"
}

{
  "head_templates": [
    {
      "args": {
        "1": "tpi",
        "2": "proper noun"
      },
      "expansion": "PNG",
      "name": "head"
    }
  ],
  "lang": "Tok Pisin",
  "lang_code": "tpi",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Papua Niugini"
        }
      ],
      "categories": [
        "Pages with 3 entries",
        "Pages with entries",
        "Tok Pisin entries with incorrect language header",
        "Tok Pisin initialisms",
        "Tok Pisin lemmas",
        "Tok Pisin proper nouns",
        "tpi:Papua New Guinea"
      ],
      "glosses": [
        "Initialism of Papua Niugini."
      ],
      "links": [
        [
          "Papua Niugini",
          "Papua Niugini#Tok_Pisin"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "PNG"
}