sort by Rank | Alpha
| Possible Meanings | Rank |
| Nursing Unit Clerk | **** |
| National University Corporation | **** |
| Nu Urban Community | **** |
| National Union Catalogue | *** |
| National University Consortium | *** |
| NATO Ukraine Commission | *** |
| National Unification Commission | *** |
| Nursing Unit Coordinator | *** |
| National Unicycle Convention | *** |
| National Union of Clerks | *** |
| Njala University College | *** |
| Nova Uranium Corp | *** |
| NetWare UNIX Client | *** |
| Nigerian University Commission | *** |
| New Uses Council | *** |
| nova uranium corporation | *** |
| National University Commission | *** |
| No User Connection | *** |
| Not Under Control | *** |
| Non Uniformity Compensation | *** |
| Nigerian Universities Commission | *** |
| nodule-unassociated cells | ** |
| nonspecific ulcerative colitis | ** |
| normal urinary control | ** |
| Nigh University Center | ** |
| National Umpiring Committee | ** |
| National Urban Coalition | ** |
| non-specific ulcerous colitis | ** |
| Nigeria University Commission | ** |
| National Universities Council | ** |
| Neutral Units of Construction | ** |
| National Unification Committee | ** |
| New University Conference | ** |
| Newtonbrook United Church | ** |
| Nailed Up Connection | ** |
| Naval Unit Commendation | ** |
| Non Unique Connection | ** |
| National University of Cordoba | ** |
| Nigeria Universities Commission | ** |
| National Users Conference | * |
| NATO Ukraine Commision | * |
| National Unicycle Conventions | * |
| Northern University Championships | * |
| National Underclassmen Com | * |
| NATO Ukraine Charter | * |
| Northeastern University China | * |
| No Unusual Circumstances | * |
| Northeastern University College | * |
| Northeastern Universitys Center | * |
| Northern Utah Chapter | * |
| Northwestern University Chemical | * |
| Northwestern University Chemistry | * |
| Northwestern University Computer | * |
| Norwegian Universities and College | * |
| Number of Unallocated Channels | * |