| Acronym | Meaning |
 | BSC | Brake Skid Controller |
| BSDP | Booster Stage Discharge Pressure |
| BSE | Booster Systems Engineer |
| BSI | Boeing Services International |
| BSI | Basic Shipping Instructions |
| BSM | Booster Separation Motor |
| BSM | Booster Separation Motors |
| BSR | Basic System Release |
| BSR | Bite Status Register |
| BSRM | Booster Solid Rocket Motor |
| BSS | Backup System Services |
| BSTR | Booster |
| BT | Burn Time (Engine) |
| BTC | Binary Time Code |
| BTC | Bus Tie Contractor |
| BTMS | Body Temperature Measuring System |
| BTR | Boom Time Remai-ni'ng |
| BTR | Burn Time Remaining |
| BTR | Bus Transfer |
| BTU | British Thermal Unit |
| BTU | Bus Terminal Unit |
| BU | Backup |
| BUC | Buckhorn |
| BUC | Backup Computer |
| BUFF | Buffer |
| BUOU | Backup Optical Unit |
| BUR | Backup Rate |
| BW | Bandwidth |
| BW | Bridgewire |
| BX | Box |
| BY | Budget Year |
| BYP | Bypass |
| C | OfF Construction Of Facilities |
| C | OfF Cost Of Facilities |
| C&T | Communications And Tracking |
| C/W | Caution And Warning |
| CA | Carrier Aircraft |
| CA | Cone Angle |
| CA | Contingency Abort |
| CA | Contract Award |
| CA | Corrective Action |
| CA | Cost Account |
| CAB | Cabin |
| CAB | Cabinet |
| CAB | Civil Aeronautics Board |
| CAB | Cost Audit Board |
| CACB | Center Aisle Connector Bracket |
| CACC | Communications And Configuration Console |
| CACON | Cargo Container |
| CAD | Computer Aided Design |
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