| Abbreviation | Definition |
|---|---|
| BKES | Brian Kelly Electrical Services |
| BKLTNG | Break-Lock ECM Training |
| BL | Band Limited |
| BL | Battery Low |
| BLAD | Basic Layout And Design |
| BLD | Beam Lead Device |
| BLE | Bluetooth Low Energy |
| BLF | Band Limiting Filter |
| BLM | Ball-Limiting Metalization |
| BLM | Beam Loss Monitor |
| BLT | Balanced Line Tuner |
| BLUE | Baltic Latvian Universal Electronics |
| BM | Bending Magnet |
| BM | Bitmap |
| BMC | Bubble Memory Controller |
| BME | Background Mesh Element |
| BMEE | Bulkhead Mounted Electronic Enclosure |
| BMH | Beach Man Hole |
| BMO | Bounded Mean Oscillation |
| BMP | Windows or OS/2 Bitmap image format |