| Acronym | Definition |
|---|
| BISA | British International Studies Association |
| BISA | Borlaug Institute for South Asia (agriculture; India) |
| BISA | British International Spa Association (UK) |
| BISA | Black Women in Sisterhood for Action (Washington, DC) |
| BISA | Battlefield Information System Application (Defence Digitisation, UK) |
| BISA | Berkeley Indonesian Student Association |
| BISA | Business Information Systems Association |
| BISA | Business Integrity Systems Assessment |
| BISA | Biometric Identification System for Access (US Army) |
| BISA | Built-In Self Analysis |
| BISA | Battlefield Information System Applications |
| BISA | Bonding and Insurance Specialists Agency (Bridgeview, IL) |
| BISA | Best IRIG (Inter-Range Instrumentation Group) Source Algorithm (global posisitioning system synchronization) |