| Building Research Systems | Academic & Science |
| Bonded Rubber Shaft | Academic & Science |
| Boureska | Academic & Science |
| Bertrand Russell Society | Academic & Science |
| Bureau of Rural Sciences | Academic & Science |
| Bristol | Airport Code |
| Bank Reconciliation Statement | Banking |
| Banco Rio de la Plata, S. A. | Business |
| Bibliographic Research Service | Business |
| Blue Ribbon Sports | Business |
| Business Reduction Sale | Business |
| Business Resource Solutions | Business |
| Business Requirement Specification | Business |
| Business Recovery Service | Business |
| Bus Reservation System | Community |
| Boca Raton Synagogue | Community |
| Basel, Rotterdam, Stockholm | Community |
| Business Recovery Server | Computer Hardware |
| Break Request Signal | Computing |
| Business Recovery Services | Computing |
| Bio Resonance Scan | General |
| Boost Recuperation System | General |
| British Road Services | General |
| Bahr Roellgen Standard | General |
| Broneboyniy Reactivniy Snaryad | General |
| Ballistic Recovery System | General |
| Bio Rolled Stainless | General |
| Behavioral response studies | General |
| Bulk Reef Supply | General |
| Bibliographical Retrieval Services | General |
| Bara Raya Sukses | General |
| Bathroom Recycle System | General |
| Brisbane Riot Squad | General |
| Barry Rogliano Salles | General |
| Barker Rinker Seacat | General |
| Black Rocket Shooter | General |
| Benefit Recovery Services | General |
| Beatles Rolling Stones | General |
| Behavioral Recognition Systems | General |
| Bravo Reimbursement Specialists | General |
| Boslego Risk Services | General |
| Biennial Reporting System | General |
| Ballistic Recovery Systems | General |
| Brownfield Redevelopment Solutions | General |
| Building Regulations Scheme | General |
| Broadband Radio Service | General |
| Boards Review series | General |
| Blended Retirement System | General |
| Backup Recovery System | General |
| Baggage Reconciliation System | General |
| Big Red Soil | General |
| Behavioral Response Study | General |
| Battlefield Reasoning System | General |
| Bigraphical Reactive Systems | General |
| Brooklands Road Special | Governmental |
| Board Review Series | Governmental |
| Blue Ridge Shores | Governmental |
| Bureau of Rehabilitative Services | Governmental |
| BIRSINGHPUR | Indian Railway Station |
| Bainbridge Ropers Syndrome | Medical |
| Baroreceptor Reflex Sensitivity | Medical |
| baroreceptor sensitivity | Medical |
| Bibliographic Retrieval Service | Medical |
| Body Restraint System | Medical |
| British Roentgen Society | Medical |
| Brown Recluse Spider | Medical |
| Bureau of Rehabilitation Services | Medical |
| Behavior Rehabilitation Services | Medical |
| Binaural Room Scanning | Military and Defence |
| Building Regularisation Scheme | Real Estate |
| Bristol, England, UK | Regional |
| British Rhythm Services | Regional |
| Brotherhood of Railroad Signalmen | Regional |
| Brick Railway Systems | Regional |
| Big Red Switch | Space Science |
| Bottom Right Side | Space Science |
| Bear Retardant Suit | Sports |
| Brantford Red Sox | Sports |
| Biotechnology Regulatory Services | Technology |
