| Abbreviation | Definition |
|---|---|
| NUAW | National Union of Agricultural Workers |
| NUBS | Non Union Brothers and Sisters |
| NUC | The National Union Catalog |
| NUCD | National Union of Christian Democrats |
| NUCSSI | National Union Catalogue of Scientific Serials in India |
| NUCSSI | National Union Catlogue of Science Serials in India |
| NUCU | National Union of Cannabis Users |
| NUDE | National Union of Domestic Employees |
| NUDR | National Union for Democracy and Renewal |
| NUFAW | National Union of Furniture and Allied Workers |
| NUFAWSA | The National Union of Furniture Allied Workers SA |
| NUFAWSA | The National Union of Furniture & Allied Workers SA |
| NUFBWSAW | National Union of Food, Beverages, Wine, Spirits and Allied Workers |
| NUFF | National Union of Freedom Fighters |
| NUFW | National Union of Foundry Workers |
| NUGAS | National Union of Greek Australian Students |
| NUGE | National Union of Government Employees |
| NUGS | National Union of Ghana Students |
| NUI | Norwich Union Insurance |
| NUIW | National Union of Insurance Workers |