| Acronym | Meaning |
 | BIORESP | Bio Response |
| BIP | Balloon-borne (instrument) Platform |
| BIT | Binary Digit |
| BIT | Binary Digit (either 0 Or 1) |
| BIT | Built-in Test |
| BITNET | Because It's Time Network |
| BITS | Biologically Important Trace Species |
| BL | Beta Lambda |
| BLIP | Boundary Layer Instrument Package |
| BLM | Bureau Of Land Management |
| BLP | Boundary Layer Profiler |
| BLPS | Boundary Layer Profiler System |
| BLS | Bureau Of Labor Statistics |
| BLSG | Boundary Layer Sensing Group |
| BMDO | Ballistic Missile Defense Organization |
| BMFT | Bundesminsterium Fur Forschung Und Technologie |
| BMI | Battelle Memorial Institute |
| BMO | Ballistic Missile Office |
| BMRC | Bureau Of Meteorology Research Centre |
| BMRR | Brookhaven Medical Research Reactor |
| BNFL | British Nuclear Fuels Limited |
| BNI | Bechtel National |
| BNL | Brookhaven National Laboratory |
| BNM | Bandelier National Monument |
| BNSC | British National Space Centre |
| BNW | Battelle Northwest |
| BNWL | Battelle Northwest Laboratory |
| BOD | Board Of Directors |
| BOD | Beneficial Occupancy Date |
| BOF | Birds Of A Feather |
| BOM | Bureau Of Mines |
| BOMAP | Barbados Oceanographic And Meteorological Analysis Program |
| BOMAP | BOMEX Analysis Program |
| BOMEX | Barbados Oceanographic And Meteorological Experiment |
| BOR | Burnout Risk |
| BOREAS | Boreal Ecosystem Atmosphere Study |
| BOSS | Badge Office Security Sytem |
| BP | Boundary Profile |
| BP | Budget And Planning Office |
| BPA | Bonneville Power Administration |
| BPA | Blanket Purchase Award |
| BPI | Bits Per Inch |
| BPI | Budget |
| BPS | Bits Per Second |
| BPS | Baud-per-second |
| BPSG | Budget Planning And Systems Group |
| BRAN | Boulder Research And Administrative Network |
| BRASS | Basic Rapid Alarm Security System |
| BRAVE | Boeing Robotic Air Vehicle |
| BRI | Basic Rate Interface |
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