| Abbreviation | Definition |
|---|---|
| NB | New Blood |
| NB | New Business |
| NBAA | National Business Aviation Association |
| NBAI | National Business Advertising Incorporated |
| NBAI | Nebula AI |
| NBB | North Bay Bancorp |
| NBBC | New Braunfels Brewing Company |
| NBBI | National Benefit Builders Inc |
| NBC | Nakahama Broadcasting Corporation |
| NBC | Nancy Biscuit Company |
| NBC | National Biscuit Company |
| NBC | National Broadcasting Corporation |
| NBC | National Business Centre |
| NBC | Nepotism Broadcasting Company |
| NBC | Non Brodcast Company |
| NBC | Not Bobs Company |
| NBC | Not Bright Corporation |
| NBCA | NTN Bearing Corporation of America |
| NBCC | National Buildings Construction Corporation |
| NBCI | National Background Check Inc |