Ata
- A.T.A. (Greenland)
- AATA (disambiguation)
- ATA Airlines
- ATA Airlines (Iran)
- ATA Carnet
- ATA Cruiser
- ATA Holdings
- ATA chapter numbers
- Aberri Ta Askatasuna
- Advanced Technologies Academy
- Africa Travel Association
- Air Transport Auxiliary
- Airlift/Tanker Association
- Airlines for America
- Alastua railway station
- Albanian Telegraphic Agency
- Alberta Teachers' Association
- Allen Telescope Array
- Alternating timed automaton
- Amateur Trapshooting Association
- American Taekwondo Association
- American Telemedicine Association
- American Telugu Association
- American Tennis Association
- American Thyroid Association
- American Tinnitus Association
- American Topical Association
- American Translators Association
- American Trucking Associations
- Analog telephone adapter
- Antarctica
- Anti-thyroglobulin antibodies
- Anti-topoisomerase antibodies
- Anti-transglutaminase antibodies
- Archery Trade Association
- Artists' Television Access
- Ashcroft Technology Academy
- Asia Theological Association
- Association of Talent Agents
- Associazione Traffico e Ambiente
- Ata (name)
- Ata Caldera
- Ata Gears
- Ata language (disambiguation)
- Atacama skeleton
- Atlantic Treaty Association
- Automotive Technician Accreditation
- Ața
- Comandante FAP Germán Arias Graziani Airport
- Hall-Miller Municipal Airport
- List of auxiliaries of the United States Navy
- Parallel ATA
- Standard atmosphere (unit)
- Áta
- ʻAta
- ʻAtā