| BAER |
Burned Area Emergency Response (older link archive) |
| BAM |
Body and Mind |
| BARC |
Beltsville Agricultural Research Center (older link archive 1; archive 2) |
| BARDA |
Biomedical Advanced Research and Development Authority |
| BAS |
Boundary and Annexation Survey |
| BATFE |
Bureau of Alcohol, Tobacco, Firearms and Explosives |
| BATS |
Bomb Arson Tracking System |
| BB |
Biologics Branch |
| BBB |
Biostatistics and Bioinformatics Branch (older link archive) |
| BBCB |
Division of Biomedical Technology, Bioinformatics, and Computational Biology |
| BBD |
Biosystems and Biomaterials Division |
| BBDB |
Behavioral and Brain Development Branch (unable to verify 5/16; likely merged into Brain Development Research Consortium) |
| BBEBP |
Biosafety, Biosecurity, and Emerging Biotechnology Policy Division |
| BBG |
Broadcasting Board of Governors |
| BBL |
Bird Banding Laboratory (older link archive) |
| BBNP |
Better Buildings Neighborhood Program |
| BBPSB |
Basic Biobehavioral and Psychological Sciences Branch |
| BBRB |
Biorepositories and Biospecimen Research Branch |
| BBS |
North American Breeding Bird Survey |
| BBTD |
Biosciences and Biotechnology Division |
| BC |
C.W. Bill Young Cell Transplantation Program | Bureau of Competition |
| BC3 |
Building Component Cost Community |
| BCA |
Biosurveillance Coordination Activity (unable to verify 6/14) |
| BCAP |
Biomass Crop Assistance Program (unable to verify 5/18) |
| BCBB |
Bioinformatics and Computational Biosciences Branch (unable to verify 11/16) |
| BCCI |
Border Community Capital Initiative |
| BCFB |
Biotechnology Core Facility Branch |
| BCN |
Behavioral and Cognitive Neuroscience Research Branch |
| BCOE |
FBI Biometric Center of Excellence (older link archive) |
| BCP |
Basic Center Program | Bureau of Consumer Protection |
| BCPRU |
Biological Control of Pests Research Unit (older link archive) |
| BCRS |
Bureau of Clinician Recruitment and Service (merged into BHW) |
| BCS |
Division of Behavioral and Cognitive Sciences |
| BCSB |
Behavioral and Clinical Surveillance Branch |
| BCSC |
National Bulk Cash Smuggling Center |
| BCSRB |
Behavioral and Cognitive Science Research Branch (changed to BCN) |