| Abbreviation | Definition |
|---|---|
| BIO | Bureau of International Organizations |
| BIOS | Basic Input/ Output System |
| BIP | Basic Interoperability Protocol |
| BIP | Budget Increment Package |
| BIPAR | Bistatic Parasitical Radar |
| BIPS | Battlefield Imaging Projectile System |
| BIPSOT | Bangladesh Institute of Peace Support Operation Training |
| BIRDS | Burroughs Information Retrieval and Dissemination System |
| BIRS | Battlefield Information Reporting System |
| BIS | Battlefield Information System |
| BIS | Battlespace Information System |
| BISDN | Broadband Integrated Services Digital Network |
| BISE | Brigade Intelligence Support Element |
| BISS | Base Installation Security System |
| BIT | Binary digIT |
| BIT | Built-In Test |
| BITE | Band Interrupt Tactical Emitter |
| BITE | Built-In Test Equipment |
| BITS | Battlefield Information Transmission System |
| BIU | Beach Interface Unit |