ABC are the first three letters of the Latin alphabet. They may refer to:

Broadcasting media

• American Broadcasting Company, a private US broadcaster
• Australian Broadcasting Corporation, national publicly funded broadcaster of Australia
• ABC Radio, the former name of Cumulus Media Networks, an American radio network (formerly owned by the American Broadcasting Company)
• ABC (Swedish news programme), a regional news programme
• Asahi Broadcasting Corporation, a Japanese commercial television and radio station
• Associated Broadcasting Company, a Philippine television network
• Associated British Corporation, a former British film and television company
• ABC (newspaper), Spanish daily newspaper

Cars

• ABC (1906 automobile), an American car
• ABC (1920 automobile), an English car
• ABC (1922 automobile), a planned American car
• Active Body Control, a type of automobile suspension technology
• ABC Motors, an English manufacturer of aircraft, aero engines and cars

Companies

• ABC Stores (Hawaii), a chain of convenience stores
• ABC Group, a department store
• ABC Learning Centres, an Australian child care business
• Agricultural Bank of China, a bank in the People's Republic of China
• Aerated Bread Company, a former and 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)

Computer science

• ABC (computer virus), virus
• ABC (programming language), an imperative general-purpose programming language and programming environment developed at CWI, Netherlands by Leo Geurts, Lambert Meertens, and Steven Pemberton
• Artificial Bee Colony Algorithm, a search algorithm used for optimizing multi-variable and multi-modal numerical functions
• ABC (stream cipher), a stream cipher algorithm
• ABC (Yet Another BitTorrent Client), a free software, open source BitTorrent client based on BitTornado
• ABC, a line of computer models designed by Dataindustrier AB of Sweden
• ABC notation, a language for notating music using the ASCII character set
• 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
• Alcatel Business Communications, a telecommunications protocol
• Atanasoff Berry Computer, an early electronic digital computer

Economics

• ABC analysis, an inventory categorization technique
• Activity-based costing, an accounting method

Mathematics

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

Medicine and biology

• 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

Motorcycles

• ABC motorcycles

Music

Songs and albums

• ABC (album), a 1970 album by The Jackson 5
  • "ABC" (song), a 1970 song by The Jackson 5
• ABC (Jin album), a 2007 album by Chinese-American rapper Jin. ABC is Jin's fourth overall album, which was released on February 20, 2007
  • "ABC" (Jin song), Jin's first single off his 4th album "ABC" (American-born Chinese)
• "ABC" (Pipettes song)
• Alphabet song, or "the ABC's", a song used to teach children the alphabet
• ABCs (song), the first official single by rapper K'naan on his album Troubadour

Groups

• ABC (band), a UK New Wave band
• Another Bad Creation, an American R&B and rap musical group
• Acid Black Cherry, a Japanese Rock band
• Alien Beat Club, a Danish pop band

Record labels

• ABC Classics, an Australian record label
• ABC Records, an American record label

Other music

• O2 ABC Glasgow, a music venue
• ABC notation, a musical notation language

Organizations and projects

Ornithological

• African Bird Club, a British ornithological charity
• Australian Bird Count, a project of the Royal Australasian Ornithologists Union

Political

• All Basotho Convention, a political party in Lesotho
• Americans Battling Communism, an anti-communist organization in the United States
• Anarchist Black Cross, an anarchist political support organization
• Anything But Conservative, or ABC campaign, 2008 Canadian federal election political campaign
• Association of British Counties, an advocacy group
• Anti-Bases Campaign, an organisation campaigning to remove foreign military bases and intelligence installations from New Zealand, and to dismantle the Government Communications Security Bureau

Religious

• Association of Baptist Churches in Ireland, a Republic of Ireland and a United Kingdom based Christian denomination

Sports

• Amateur Boxing Club (alternate name of Amateur Boxing Association of England), the governing body of amateur boxing clubs in England
• Indianapolis ABCs, a Negro league baseball team that played in the early to mid 1900s

Other organizations and projects

• African Black Coalition, a University of California student organization
• Aircraft Builders Council, a provider of aviation products liability insurance
• American Bowling Congress, now part of the United States Bowling Congress

Places

• ABC nations, a political term referring to Argentina, Brazil and Chile
• ABC Islands (Alaska), a term referring to Admiralty Island, Baranof Island, and Chichagof Island
• ABC islands (Lesser Antilles), a term referring to Aruba, Bonaire, and Cura ao
• ABC Region, an industrial area outside of S o Paulo, Brazil
• Academia Brit nica Cuscatleca (ABC), a school in Santa Tecla, El Salvador
• Altnabreac railway station (National Rail code), in Scotland
• American Bank Center, an arena located in Corpus Christi, Texas

Publications and media organizations

• ABC (Audit Bureau of Circulations UK), a circulation-auditing organization in the UK and Ireland
• ABC (newspaper), a Spanish newspaper founded in 1903
• Alphabet book, or ABC book, any of several children's books depicting the alphabet
• America's Best Comics, an imprint of DC Comics
• Audit Bureau of Circulations (North America), a circulation-auditing organization in North America
• Audit Bureau of Circulations (India), a circulation-auditing organization in the India

Technology

• ABC Dry Chemical, a fire extinguishing agent
• ABC weapon or Weapon of mass destruction
• Aerial bundled cable, for power lines
• Automatic Buffer Couplers, railway couplers
• Alice, Bob and Charlie (and variants), a nomenclature convention used in cryptography

Other uses

• ABC Futebol Clube, a football (soccer) club based in Natal, Rio Grande do Norte, Brazil
• Advanced Booking Charter, a kind of air travel
• Air batu campur, also known as ais kacang, a Malaysian dessert
• Alcoholic beverage control state, the American system of state regulation of alcoholic beverage sales
• Alien big cat or phantom cat, a large feline that has been purported to appear in regions outside its indigenous range
• Alphabet, a standardized set of letters
• American-born Chinese, people of Chinese ethnicity born in the USA
• Andrew Cunningham, 1st Viscount Cunningham of Hyndhope (1883 1963), nicknamed ABC, a British World War II admiral
• Archbishop of Canterbury
• Asian brown cloud A layer of air pollution
• "ABC-DEF-GHI", a song from the television show Sesame Street
• "Always Be Closing", a sales and marketing aphorism that stresses the importance of completing as many possible sales as often as possible. Notably expounded on by the character Blake in the David Mamet-written movie Glengarry Glen Ross

af:ABC ar:ABC bg:ABC bs:ABC ( vor) ca:ABC cs:ABC da:ABC de:ABC et:ABC es:ABC eo:ABC eu:ABC fa:ABC fr:ABC gl:ABC ko:ABC hr:ABC (razdvojba) io:ABC id:ABC it:ABC he:ABC ( ) la:ABC lv:ABC hu:ABC (egy rtelm s t lap) ms:ABC nl:ABC ja:ABC no:ABC nn:ABC pl:ABC pt:ABC ro:ABC ru:ABC sq:ABC simple:ABC sk:ABC sl:ABC sr: - - fi:ABC sv:ABC tl:ABC th: uk:ABC vi:ABC zh-yue:ABC zh:ABC