| UIS | Ulnar Impaction Syndrome
| Others |
| UIS | Unclamped Inductive Switching
| Others |
| UIS | UNESCO Institute for Statistics
| Others |
| UIS | Union Internationale de Speleologie
| Others |
| UIS | Unit Identification System
| Others |
| UIS | Unit Injector System
| Others |
| UIS | Universal Information Services
| Others |
| UIS | University Indentured Servant
| Others |
| UIS | University Information Services
| Others |
| UiS | University Information Systems
| Others |
| UIS | University of Illinois at Springfield
| Others |
| UIS | University of Illinois Springfield
| Others |
| UIS | Upregulated In Infective Sporozoites
| Others |
| UIS | UPS Internet Shipping
| Others |
| UIS | User Interface Service
| Others |
| UIS | User Interface Services
| Others |
| UIS | User Interface Specification
| Others |
| UIS | User Interface Suite
| Others |
| UIS | User Interface Support
| Others |
| UIS | User Interface System
| Others |
| UIS | Usless Information Superhighway
| Others |
| UIS | Utilities Instrumentation Service
| Others |
| UIS | WindowBlinds Skin file
| Others |