| Abbreviation | Definition |
|---|---|
| BFU | Brain Free User |
| BGL | Budget General Ledger |
| BGMAP | Border Getway Management Protocal |
| BGMP | Border Gateway Multicast Protocol |
| BGP | Border Gateway Protocol |
| BHO | Browser Help Object |
| BI | Backup Interface |
| BIA | Burned-In Address |
| BID | Bridge ID |
| BID | Bridge IDentification |
| BII | Business Information Infrastructure |
| BIOS | Binary Interrupt Output Service |
| BIS | Binary Individual Stream |
| BIS | Built In Standard |
| BITNET | Because It is Time NETwork |
| BITW | Bump In The Wire |
| BIU | Blocked Is User |
| BL | Balance Line |
| BL | Brokering Layer |
| BLAN | Building Local Area Network |