| Acronym | Definition |
|---|
| UIS | Universidad Industrial de Santander (Colombia) |
| UIS | User Interface Specification |
| UIS | UNESCO Institute for Statistics |
| UIS | User Interface System |
| UIS | Useless Information Society (established in 1995) |
| UIS | Unit in Service (used especially in paging industry) |
| UIS | University of Illinois at Springfield |
| UIS | User in Service (SS7 SCCP) |
| UIS | University Information Services |
| UIS | Union Internationale de Spéléologie (international body for caving and speleology.) |
| UIS | Ubiquitous Information System |
| UIS | Ube Information Systems (Japan) |
| UIS | Universal Information Services |
| UIS | Unit Injector System |
| UIS | User Interface Service |
| UIS | User Interface Suite |
| UIS | User Interface Support |
| UIS | United Irish Societies (various locations) |
| UIS | Unix Integration Services (Citrix) |
| UIS | Unit Identification System |
| UIS | Umpire Information System (QuesTek device for judging balls and strikes) |
| UIS | UNESCO (United Nations Educational, Scientific and Cultural Organization) Institute for Statistics (Quebec, Canada) |
| UIS | UV/EUV Imaging Spectrometer |
| UIS | Universal Information Service |
| UIS | Universal Info Service (data e ntry company) |
| UIS | University Identity System (China) |
| UIS | Upper Information Service |
| UIS | User Introduction Sessions (software testing/training) |