The letters A, B, and C are the first three letters of the Latin alphabet.

Abbreviations

ABC is an abbreviation with many meanings:

• Biology
  • Abacavir, a reverse transcriptase inhibitor and potential treatment for AIDS
  • ATP Binding Cassette, a protein motif characteristic of a family of transporter proteins .
  • Alien big cat is used in cryptozoology.

• Computing
  • The Atanasoff Berry Computer, completed in 1942; also in ABC Computer
  • ABC (Yet Another Bittorrent Client), a bittorrent client based on BitTornado.

• Government
  • ABC weapons: Atomic, Biological, and Chemical warfare. This abbreviation has largely been superceded by NBC, where the "N" stands for "nuclear", or WMD.
  • Alcoholic beverage commission and in ABC store , a liquor store run by this commission

• Health care
  • In first aid, ABC is a mnemotecnic acronym for airways, breathing, circulation, the three vital functions that must be checked and maintained for a casualty during CPR (cardiopulmonary resuscitation); it was invented by Peter Safar.

• Mass media
  • American Broadcasting Company, a radio and television network in the United States.
  • Asahi Broadcasting Corporation, a radio and television broadcaster in Osaka, Japan
  • Associated British Corporation, a former British television company.
  • Audit Bureau of Circulations, organization for North American advertisers and publications
  • Australian Broadcasting Corporation, a radio and television network in Australia.

• Music
  • ABC is a musical notation language, used especially in ASCII files because of its simplicity.

• People
  • American-born Chinese
  • Andrew Browne Cunningham, British admiral
  • Archbishop of Canterbury
  • Australian-Born-Chinese.

• Places
  • ABC islands: Aruba, Bonaire and Curaçao.
  • Adventist Book Center
  • Atlantic Baptist College, the former name of Atlantic Baptist University in Moncton, New Brunswick, Canada.

• Slang
  • Already Been Chewed, for used chewing gum

• Uncategorized businesses
  • American Bowling Congress
  • Atlanta, Birmingham & Coast Railroad (also as AB&C)
  • Atlanta Bread Company

• Miscellaneous
  • Activity Based Costing
  • Anarchist Black Cross
  • AAR reporting mark ABC)
  • Association of British Counties
  • Aural brevity code

Part of name

ABC is also the part of many proper names without having a specific meaning as an acronym.

• Automobile markets
  • ABC (1906 automobile), an American carmarket
  • ABC (1920 automobile), an English carmarket
  • ABC (1922 automobile), a planned (but never built) American carmarket
  • ABC (B) , a Belgian carmarket

• Computing
  • ABC ALGOL is an extension of Algol 60.
  • ABC 80 was a home computer around 1980.
  • ABC programming language, an imperative programming language developed at CWI (Amsterdam, the Netherlands). It served as inspiration for the Python programming language.

• Government
  • The ABC Trial - an official secrets trial in the UK

• Literature
  • The ABC Murders - a novel by Agatha Christie

• Mass media
  • Diario ABC, a newspaper in Spain.

• Mathematics
  • Abc Conjecture, a conjecture in number theory

• Music
  • "ABC" is a 1970 #1 hit single recorded by The Jackson 5 for the Motown label. The ABC album it anchors includes it and the #1 hit "The Love You Save".
  • ABC, the name of an early 1980s new wave music band fronted by Martin Fry.
  • Another Bad Creation, early 1990s juvenile hip hop/R&B musical group.
  • ABC Records is a recording label.

• Uncategorized businesses
  • ABC Motors