Big Fucking Deal 
Big F'ing Deal 
Back Focal Distance 
BENFORD 
Binary File Descriptor 
BASIC FILE DIRECTORY 
Bidirectional Forwarding Detection 
Bidrectional Forwarding Detection 
Big freakin' deal 
Babylon Fire Department 
Bailey Fire Department 
Bainbridge Fire Department 
Bakersfield Fire Department 
Baldwin Fire Department 
Ballinger Fire Department 
Bangor Fire Department 
Baraboo Fire Department 
Baraga Fire Department 
Barberton Fire Department 
Barnard Fire District 
Barnstable Fire Department 
Barrington Fire Department 
Bartlesville Fire Department 
Bartlett Fire Department 
Bartow Fire Department 
Basic Flight Design 
Basic Floppy Disk 
basis for design 
Bastrop Fire Department 
Batavia Fire Department