| .bad |
Exchange Badmail File |
| .bdp |
Exchange Diagnostic Message |
| .bna |
Barna Word Processor Document |
| .bcf |
Business Card Designer Pro File |
| .btw |
BarTender Label |
| .bsa |
Bethesda Softworks Archive |
| .bls |
Blockland Saved Game File |
| .bun |
Cakewalk Bundle File |
| .b6i |
BlindWrite 6 Disc Image |
| .b6t |
BlindWrite 6 Track Information File |
| .bnk |
Adlib Instrument Bank |
| .bau |
Apache OpenOffice AutoText File |
| .bjo |
TabRite Tablature File |
| .bpw |
Bitser Password File |
| .bdmv |
Blu-ray Disc Movie Information File |
| .bar |
Age of Empires 3 Data File |
| .brw |
Calyx Point Borrower File |
| .bks |
NTBackup Settings File |
| .bmk |
BillMinder Backup File |
| .bdl |
CoCreate Bundle File |
| .bcc |
Calendar Creator File |
| .bm2 |
Boardmaker Interactive Board File |
| .bdc |
Babylon Dictionary File |
| .bmd |
MU Online Game Data File |