| Acronym | Definition |
|---|
| FIU➣Florida International University |
| FIU➣Financial Intelligence Unit |
| FIU➣Fire It Up |
| FIU➣Faculdades Integradas Urubupungá (Brazilian college) |
| FIU➣Fingerprint Identification Unit |
| FIU➣Fingerprint Identification Unit (Sony) |
| FIU➣Fire Investigation Unit |
| FIU➣Forensic Identification Unit (various locations) |
| FIU➣Fraud Investigation Unit (UK) |
| FIU➣Foundation for International Understanding |
| FIU➣Facsimile Interface Unit |
| FIU➣Florida Intelligence Unit |
| FIU➣Forensic Investigation Unit |
| FIU➣Facilities Interface Unit |
| FIU➣Fiber Interface Unit |
| FIU➣Forward Interpretation Unit |
| FIU➣FDDI Interface Unit |
| FIU➣Fault Insertion Unit (aircraft) |
| FIU➣Fiber Optic Interface Unit |
| FIU➣Files and Information Unit |