sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| University of Southern | ***** |
| Utah Symphony Opera | **** |
| United Services Organization | **** |
| User Service Order | **** |
| Unidentified Submerged Objects | **** |
| Universal Service Obligations | **** |
| Used to Support | **** |
| Unix Software Operation | **** |
| Unilateral Salpingo Oophorectomy | *** |
| User Services Office | *** |
| United States Office | *** |
| United Seniors of Oakland | *** |
| Unit Standing Orders | *** |
| united states olympic | *** |
| United States Organization | *** |
| Udaipur Solar Observatory | *** |
| United Services Organizations | *** |
| United Services Organisation | *** |
| United Slaves Organization | *** |
| Uniform Service Order | *** |
| Understanding Special Operations | ** |
| União Sindical Operária | ** |
| United States Operations | ** |
| United Service Organisations | ** |
| Utah State Office | ** |
| United Schools Organisation | ** |
| Universal Strategy Optimizer | ** |
| University of Sydney Orange | ** |
| United Samoan Organization | ** |
| Unley Symphony Orchestra | ** |
| una sospensione oleosa | ** |
| Union of Student Organizations | ** |
| Unidentified Sailing Object | ** |
| Urologic Specialists of Oklahoma | ** |
| Uniglobal Services Outsourcing | ** |
| Unión Sindical Obrero | ** |
| Undergraduate Scholarship Office | ** |
| Uniformed Services Organization | ** |
| United Servicemens Organization | ** |
| Uniform Service Organization | ** |
| united shipping organization | ** |
| University Scholars Organization | ** |
| University System Office | ** |
| Unmanned Seismic Observatory | ** |
| Under the Sink Ozone | * |
| United Substitutes Organization | * |
| User Support Organisation | * |
| Utrechts Stedelijk Orkest | * |
| Un Started Object | * |
| Unidentified Submersed Objects | * |
| United Selling Organization | * |
| United States of Omerica | * |
| Universal Share Ownership | * |
| Urinary System Organs | * |
| Uniquely Southwest Outlet | * |
| University of Southampton Office | * |