| Abbreviation | Definition |
|---|---|
| BSM | Broadband Switch Module |
| BSSMAP | Base Station System Management Application Part |
| BST | Barium Strontium Titanate |
| BT | Baseline Test |
| BT | Basse Tension |
| BT | Bismaleimide Triazine |
| BT | Bluetooth |
| BTAB | Bumped Tape Automated Bonding |
| BTD | Bistable Thermal Donor |
| BTE | Boltzmann Transport Equation |
| BTL | Backplane Transceiver Logic |
| BTL | Bridge Tied Load |
| BTMF | Bomb Technician Memorial Foundation |
| BTRM | Battery Test Remote Monitor |
| BTS | Base Transceiver System |
| BTSC | Broadcast Television Systems Committee |
| BTTL | Buffered Transistor-Transistor Logic |
| BUDS | Back-Up Digital System |
| BUF | Best Usable Frequency |
| BUSET | Best Use Science Each Tme |