| FNB | Fabrique National Belgique
| Others |
| FNB | Failure Notification Board
| Others |
| FNB | Fairfield National Bank
| Others |
| FNB | Family N Business
| Others |
| FNB | Feed Northern Baits
| Others |
| FNB | Find A New Bank
| Others |
| FNB | Fine Needle Biopsies
| Others |
| FNB | Fine Needle Biopsy
| Others |
| FNB | Finition And Abbreviation
| Others |
| FNB | First National Bank
| Others |
| FNB | First National Battery
| Others |
| FNB | First Nearest Bottle
| Others |
| FNB | First Northeast Bank
| Others |
| FNB | Flexible Narrow Beam
| Others |
| FNB | Flexible Network Bus
| Others |
| FNB | Food and Nutrition Board
| Others |
| FNB | Food Not Bombs
| Others |
| FNB | Freaky Nugget Boy
| Others |
| FNB | Frequency - Narrow Band
| Others |
| FNB | Friendly Neighborhood Bank
| Others |