| Abbreviation | Definition |
|---|---|
| MB | MegaByte (1 Million Bytes) |
| MB | Mike Boat |
| MB | Military Bank |
| MB | Mounting Base |
| MB/S | Megabits per second |
| MB/TA | Battlefield Mobility/Target Acquisition |
| MBA | Main Battle Area |
| MBAR | Military Bolt Action Rifle |
| MBAT | Multi-Beam Array Tracking |
| MBB | Messerschmitt-Bölkow-Blohm |
| MBB | Modular Building Blocks |
| MBBL | Mounted Battlespace Battle lab |
| MBBLs | Thousands of Barrels |
| MBC | Mechanized Ballistics Calculator |
| MBC | Mortar Ballistic Computer |
| MBCDM | Medical Biological Chemical Defense Materiel |
| MBDL | Mortar Ballistic Computer |
| MBDM | Maritime Battle Decisive Munitions |
| MBE | Management By Exception |
| MBE | Member of the British Empire |