| Acronym | Definition |
|---|
| FRU➣Field Replaceable Unit |
| FRU➣Fiji Rugby Union |
| FRU➣Free Representation Unit (est. 1972; UK) |
| FRU➣Force Research Unit (British Army) |
| FRU➣For Reasons Unknown |
| FRU➣Front Row Union (fan club; UK) |
| FRU➣Fonds pour le Renouvellement Urbain (French: Urban Renewal Funds) |
| FRU➣Federal Reserve Unit (Malaysia) |
| FRU➣Full Retail Upgrade |
| FRU➣Bishkek, Kyrgyzstan - Bishkek Airport (Airport Code) |
| FRU➣Freshwater Research Unit |
| FRU➣Fire Rescue Unit |
| FRU➣First Responder Unit |
| FRU➣Field Research Unit |
| FRU➣Fisheries Research Unit |
| FRU➣Flat Rate Unit (automotive) |
| FRU➣Florida Rugby Union |
| FRU➣Frequency Reference Unit |
| FRU➣Fuselage Refueling Unit (air to air refueling) |