may refer to:
- ABA Games , a Japanese creator of freeware games
- A.B.A , a character in the fighting game series ''Guilty Gear''
is a Three-letter Acronym that may also refer to:
- AB Aerotransport , a former Scandinavian airline
- IATA airport code for Abakan Airport , in Russia
- Aberdare Railway Station , in the United Kingdom
- Abscisic Acid , a plant hormone
- Alameda Ballet Academy , a ballet school in Alameda, California, United States
- Amateur Boxing Association Of England
- American Bandy Association , the US bandy association
- American Bankers Association
- American Baptist Association
- American Bar Association
- American Basketball Association (1967-1977)
- American Basketball Association (2000-)
- American Bicycle Association
- American Birding Association
- American Booksellers Association
- Accredited Business Accountant , an accounting credential granted by the Accreditation Council for Accountancy and Taxation in the United States
- Applied Behavior Analysis , a technique used to modify behavior; frequently used to treat Autism
- Architectural Barriers Act Of 1968
- Asahi Broadcasting Aomori , a television station in Aomori Prefecture, Japan
- Australian Basketball Association
- Australian Broadcasting Authority
- Ternary Form in music
- ABA transit number issued by the American Banking Association: see Routing Transit Number
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