ABC are the first three letters of the Latin script.

ABC may refer to:

• 1 Broadcasting
• 2 Companies
• 3 Computers
• 4 Economics
• 5 Science and medicine
  • 5.1 Mathematics
• 6 Music
  • 6.1 Songs and albums
  • 6.2 Groups
  • 6.3 Other
• 7 Organizations
  • 7.1 Ornithology
  • 7.2 Politics
  • 7.3 Religion
  • 7.4 Other
• 8 Places
• 9 Publications and media
• 10 Technology
• 11 Transport
  • 11.1 Cars
  • 11.2 Other
• 12 Other uses

• American Broadcasting Company, a commercial U.S. broadcaster
  • ABC Radio, the former name of the American radio network Cumulus Media Networks
  • Disney–ABC Television Group, parent organization of ABC Television Network
• ABC (newspaper), Spanish daily newspaper
• ABC (Swedish news programme), a regional news programme
• ABC Development Corporation, a Philippine television company
• Asahi Broadcasting Corporation, a Japanese commercial television and radio station
• Associated British Corporation, a former British film and television company
• Australian Broadcasting Corporation, national publicly funded broadcaster of Australia
• ABC (Australian TV channel), the flagship TV channel of the Australian Broadcasting Corporation

• ABC Stores (Hawaii), a chain of convenience stores in Hawaii
• ABC Group, a department store
• ABC Learning Centres, a former Australian childcare business
• Agricultural Bank of China, a bank in the People''s Republic of China
• Aerated Bread Company, a once-famous British bakery and tea-room chain
• Appalachian Brewing Company, an American brewery
• Arab Banking Corporation
• ABC Cinemas, a UK cinema chain
• Anglo Belgian Corporation, diesel engine manufacturer
• Audit Bureau of Circulations, publication circulation auditing companies
  • Audit Bureau of Circulations (India)
  • Audit Bureau of Circulations (UK)
  • Audit Bureau of Circulations (North America)

• ABC (computer virus)
• ABC (programming language), a programming language and environment
• ABC (stream cipher), a stream cipher algorithm
• ABC (Yet Another BitTorrent Client), a BitTorrent client
• ABC, a line of computers by Dataindustrier AB
• ABC notation, a language for music notation
• Abstract base class, a programming language concept
• Acorn Business Computer, a series of microcomputers announced at the end of 1983 by the British company Acorn Computers
• .abc, ActionScript Byte Code files; see Comparison of application virtual machines
• Alcatel Business Communications, a telecommunications protocol
• Artificial Bee Colony Algorithm, a search algorithm
• Atanasoff–Berry Computer, an early electronic digital computer

• ABC analysis, an inventory categorization technique
• Activity-based costing, an accounting method
• Assignment for the benefit of creditors, a concept in bankruptcy law

• Abacavir, an antiretroviral drug used to treat HIV/Aids
• ABC (medicine), a mnemonic for "Airway, Breathing, Circulation"
• ABC model of flower development, a genetic model
• Abortion – breast cancer hypothesis, a posited connection between breast cancer and abortion
• Aneurysmal bone cyst, a kind of lesion
• ATP-binding cassette transporter, a transmembrane protein
• ABC strategy for "Abstinence, be faithful, use a condom", a sex-education strategy

• abc conjecture, a concept in number theory
• ABC formula
• Approximate Bayesian computation, a family of statistical techniques