| Abbreviation | Definition |
|---|---|
| FUIC | Farmers Union Iced Coffee |
| FUMA | Fork Union Military Academy |
| FUSA | Farmers Union Service Association |
| FUSA | Farmers Union Services Association |
| FVIU | Federation of Vehicle Industry Unions |
| FWTU | Federated Workers Trade Union |
| FWU | Fort Wayne Union |
| FYU | Fangak Youth Union |
| GAFU | Georgian American Firefighters Union |
| GAPA | Georgia Association of Physician Assistants |
| GAWU | General Agricultural Workers Union |
| GAWU | Guiana Agricultural Workers Union |
| GBCU | Galesburg Burlington Credit Union |
| GBFCU | Greater Baltimore Fellowship Choral Union |
| GBU | Gauteng Bridge Union |
| GBU | German Beneficial Union |
| GBU | Global Battle Union |
| GBU | Global Boxing Union |
| GBU | Gourmet Burger Union |
| GBU | Greater Beneficial Union |