| Abbreviation | Definition |
|---|---|
| LFCU | Limestone Federal Credit Union |
| LFCU | Logix Federal Credit Union |
| LFEU | Legal Foundations of the European Union |
| LFFCU | Lawrence Firefighters Federal Credit Union (Massachusetts) |
| LFLU | Liberian Federation of Labor Unions |
| LFP | Labor Force Participation |
| LFTU | Lao Federation of Trade Union |
| LFTU | Lao Federation of Trade Unions |
| LFTU | Lao Federation of Trades Unions |
| LFTU | Liberia Federation of Trade Unions |
| LFU | Longy Faculty Union |
| LGEU | Lower Grade Employees Union |
| LGU | Ladies Golf Union |
| LGU | Ladies' Golf Union |
| LICU | Low Income Credit Unions |
| LISA | Labour Information Sharing Alliance |
| LIUNA | Laborers International Union of North America |
| LIUNA | Labourers International Union of North America |
| LJBU | London Jewish Bakers Union |
| LM | Labor and Management |