Fib
- Barcelona School of Informatics
- Fascia iliaca block
- Federation of International Bandy
- Festival Internacional de Benicàssim
- FiB index
- Fib (lie)
- Fib (poetry)
- Fibrillarin
- Fibrillation
- Fibrinogen
- Fibula
- Fires brigade
- First International Bank (Liberia)
- First Investment Bank
- Fluoride
- Flying inflatable boat
- Focused ion beam
- Folket i Bild
- Forwarding information base
- Fédération Internationale de Boules
- Grand Theft Auto V
- International Federation for Structural Concrete
- Kingdom of Fib
- United Nations Force Intervention Brigade