| Abbreviation | Definition |
|---|---|
| BDC | Bottom Dead Centre |
| BDFM | Brushless Doubly Fed Machine |
| BEAI | B/E Aerospace, Inc. |
| BFW | Boiler Feed Water |
| BMCR | Bio Mechanics Cycles and Repairs |
| BMTIB | Benchmark Test IB |
| BOF | Basic Oxygen Furnace |
| BOP | Blowout preventer |
| BOS | Big Oilfield Separable |
| BRS | Bonded Rubber Shaft |
| BTW | Behind The Wheel |
| BUMF | Brakes Undercarriage Mixture Fuel |
| BVR | Big Vent Reflex |
| CASM | Clusters Approach To Statistical Mechanics |
| CBOS | Cyclic Bend Over Sheave |
| CCG | Cross-Connecting Gear |
| CDFM | Crustal Deformation and Fault Mechanics |
| CEFG | Combustion Engines and Fuels Group |
| CHF | Central Hydraulic Fluid |
| CHRA | Center Hub Rotating Assembly (in a turbocharger) |