| Acronym | Definition |
|---|
| FCU | Federal Credit Union |
| FCU | Financial Credit Union (various locations) |
| FCU | Feng Chia University (Taiwan) |
| FCU | Fact Checkers Unit (web series) |
| FCU | Florida Credit Union |
| FCU | Formation Continue Universitaire (French: Continuing Education University) |
| FCU | Fraud Control Unit |
| FCU | Fused Connection Unit |
| FCU | Ferrovia Centrale Umbra (Italian: Umbrian Central Railway) |
| FCU | Fan Control Unit |
| FCU | Fan Coil Unit |
| FCU | Faith Community United (various locations) |
| FCU | Foster Care Unit (various locations) |
| FCU | Fuel Control Unit |
| FCU | Flexor Carpi Ulnaris |
| FCU | Flight Control Unit |
| FCU | Fukuyama City University (Hiroshima, Japan) |
| FCU | Familial Cold Urticaria |
| FCU | Fire Control Unit |
| FCU | Flow Control Unit |
| FCU | Field Camera Unit |
| FCU | Fare Construction Unit (airfare) |
| FCU | Field Communication Unit |
| FCU | Feedback Control Unit |
| FCU | Fuel Consumption Unit |
| FCU | Foals and Calves University (gaming) |
| FCU | Filter/Combiner Unit |
| FCU | Fussball Club Unterstrass (Zurich, Swiss soccer club) |
| FCU | Fluid Cooling Unit |