| Abbreviation | Definition |
|---|---|
| FTU | Florida Times Union |
| FTUB | Federation of Trade Unions Burma |
| FTUB | Federation of Trade Unions of Belarus |
| FTUB | Federation of Trade Unions of Burma |
| FTUB | First Trade Union Bank |
| FTUC | Fiji Trade Union Congress |
| FTUC | Fiji Trades Union Congress |
| FTUC | Free Trade Union Committee |
| FTUU | Federation of Trade Unions of Uzbekistan |
| FUA | Federal Union Army |
| FUAC | Fork Union Aquatic Club |
| FUB | Footballers Union Botswana |
| FUB | Fraternal Unions of Bermuda |
| FUBA | Federated Union of Black Artists |
| FUC | Flight Union Cockpit |
| FUCC | Formosan Union Chemical Corporation |
| FUEN | Federal Union of European Nationalities |
| FUHS | Fairfield Union High School |
| FUHS | Fallbrook Union High School |
| FUHS | Fullerton Union High School |