| Acronym | Definition |
|---|
| ANSA | Agenzia Nazionale Stampa Associata (Italian news agency) |
| ANSA | Association of Norwegian Students Abroad |
| ANSA | Artists for a New South Africa |
| ANSA | Australian National Sportfishing Association |
| ANSA | Association of Nutrition Services Agencies |
| ANSA | Association of Nurses in Substance Abuse (UK) |
| ANSA | Advanced Networked Systems Architecture |
| ANSA | Assistant to the President for National Security Affairs |
| ANSA | AIDS Nutrition Services Alliance |
| ANSA | Autonomic Network & Security Administration |
| ANSA | Adaptive Network Security Alliance |
| ANSA | Australian Network of Student Anthropologists |
| ANSA | Annapolis Naval Sailing Association |
| ANSA | Alliance of Norwegian Students Abroad |
| ANSA | Alternate Network Service Agreement |
| ANSA | ASP.NET Security Analyzer (Microsoft) |
| ANSA | Arkansas Nursing Students' Association |
| ANSA | Applied Networking and Systems Administration (degree at RIT) |
| ANSA | Anglo Nubian Society of Australia |
| ANSA | Australian National Saddlehorse Association Inc. (Australia) |
| ANSA | Abbey National Staff Association (UK) |
| ANSA | Automatic New Structure Alert |
| ANSA | Anthyodhaya Sangh |
| ANSA | 5-amino-2-naphthalenesulfonic acid (CAS NO: CAS 119-79-9; aka 1,6-Cleve's acid) |
| ANSA | Augustana Nursing Student Association (Sioux Falls, SD) |
| ANSA | Adaptive Null Steering Arrays |
| ANSA | Arlington Nursing Student Association |
| ANSA | Acção Nacional Socialista Académica |