Organizations
- Africa Travel Association, an international travel industry trade association
- Albanian Telegraphic Agency, Albanian national news organisation
- American Topical Association, a philatelic organization
- American Translators Association
- Association of Talent Agents, Los Angeles
- Atlantic Treaty Association
- Aberri Ta Askatasuna, the original name for ETA, the Basque nationalist organization
- Artists' Television Access a non-profit microcinema and art gallery in San Francisco
Read more about this topic: ATA