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A three-letter acronym, three-letter abbreviation, or TLA is an abbreviation, specifically an acronym, alphabetism, or initialism, consisting of three letters. These are usually the initial letters of the words of the phrase abbreviated, and are written in capital letters (upper case); three-letter abbreviations such as ''etc.'' and ''Mrs.'' are not three-letter acronyms, but "TLA" ''itself'' is a TLA (an example of a self-referencing definition). Most three-letter abbreviations are ''initialisms'': all the letters are pronounced as the names of letters, as in ''APA'' . Some are acronyms pronounced as a word; computed axial tomography, CAT, is almost always pronounced as the animal's name in "CAT scan". ==Examples== * Countries: UAE and USA * Politicians: FDR, JFK, and LBJ * Computer phrases: CPU, DOS, RAM, ROM, and GNU, a recursive TLA that stands for "GNU's not Unix" * File extensions: JPG, and MP3 * Corporations: IBM, AMD and NEC * Business: CEO, CFO and other C-level officers * Three Letter Agencies: CIA, FBI, FSB, and NSA * Television networks: ABC (Aus., U.S.), BBC (UK), CBC (Canada, Japan), and NHK (Japan) * Personal advertisements: SBM for Single Black Male, STR for Short Term Relationship * Chemistry, biology, pharmaceuticals: GMO, LSD and MSG * Religion: LDS * Clinical medicine: CAD and CHF * Communications shorthand: LOL and OMG * Military and weaponry: BFR and RPG * Wars and political conflicts: HYW and WWI * ISO currency codes: EUR, GBP, JPY and USD * IATA airport codes: LAX and LHR * Academic testing: ACT, HSC (Bangladesh, India and Pakistan, NSW, Vic, UK) and SAT * Canine registries: AKC and CKC * Sports leagues: NFL, MLB, (North America); AFL and NRL (Australia); NPB (Japan); ACB, LFP (Spain); IPL (India) *Ship prefixes: HMS, USS and RMS * State postal abbreviations: NSW, QLD, VIC and TAS (Australia) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Three-letter acronym」の詳細全文を読む スポンサード リンク
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