| Acronym | Definition |
|---|
| TIS➣Time In Service |
| TIS➣Telefonski Imenik Slovenije (Slovenian: Telephone Directory of Slovenia) |
| TIS➣Twenty Inches Strong (automotive wheel manufacturer) |
| TIS➣Tokyo Illustrators Society (Tokyo, Japan) |
| TIS➣Technical Information System |
| TIS➣Technology in Schools (various locations) |
| TIS➣The Inside Story |
| TIS➣Translating and Interpreting Service (various locations) |
| TIS➣The Information Society (various locations) |
| TIS➣The Internet Society |
| TIS➣Telephone Interpreting Service (various locations) |
| TIS➣Telecom Italia Sparkle (Italian telecommunications company) |
| TIS➣Trendmicro Internet Security |
| TIS➣Telephone Interconnection System |
| TIS➣Thread Independent Services |
| TIS➣Trusted Information System |
| TIS➣Trusted Information Systems |
| TIS➣Translation and Interpretation Services (various locations) |
| TIS➣Tsukuba International School (Ibaraki, Japan) |
| TIS➣Traffic Information Service |
| TIS➣Technical Information Section (various organizations) |
| TIS➣Traffic Impact Study |
| TIS➣Total Integrated Solutions (various locations) |
| TIS➣Terminological Information System |
| TIS➣Travel Industry Services (various locations) |
| TIS➣Technical Information Services |
| TIS➣Tool Induced Shift (semiconductors) |
| TIS➣Thai Industrial Standard |
| TIS➣Thermal Imaging System |
| TIS➣Total Intelligence Solutions (various locations) |
| TIS➣Thoracic Insufficiency Syndrome |
| TIS➣Tohoku International School (Tokyo, Japan) |
| TIS➣Tasmanian Institute of Sport (Australia) |
| TIS➣This Is Sparta |
| TIS➣Teaching International Students (Higher Education Academy) |
| TIS➣Truth in Savings Act of 1991 |
| TIS➣Technical Information Sheet |
| TIS➣Technology and Information Services |
| TIS➣Total Isotropic Sensitivity |
| TIS➣Teacher Induction Scheme (UK) |
| TIS➣Teacher in Space (NASA) |
| TIS➣Telemedicine Information Service (UK) |
| TIS➣Transport-Informations-Service (Germany) |
| TIS➣Theater Intelligence Section (US Navy) |
| TIS➣Trade Information Scheme (Commission for the Conservation of Southern Bluefin Tuna) |
| TIS➣Tactical Input Segment |
| TIS➣Tourist Information System |
| TIS➣Trade Information System |
| TIS➣Time Information System |
| TIS➣Technology Information Service |
| TIS➣Total Integrated Scatter |
| TIS➣Technology Infrastructure Solutions, Inc. (Boca Raton, FL) |
| TIS➣Technical Interface Specification |
| TIS➣Travelers Information Service (radio broadcasting) |
| TIS➣Turnkey Information Solutions (Jordan) |
| TIS➣Transportable Isolation System (US Air Force) |
| TIS➣Thursday Island, Queensland, Australia - Horn Island (Airport Code) |
| TIS➣Total Information System |
| TIS➣Target Ion Source |
| TIS➣Tube Inspection Station (manufacturing) |
| TIS➣Tactical Intelligence Squadron |
| TIS➣Test Information Sheet |
| TIS➣Technology Investment Strategy |
| TIS➣Tolerance Index System (EPA) |
| TIS➣Trials Instrumentation System |
| TIS➣Tullinformationssystemet (Swedish: Customs Information System) |
| TIS➣Tracking Instrumentation Subsystem |
| TIS➣Ticket Issuing System |
| TIS➣Training Integration System |
| TIS➣Technomic Information Services |
| TIS➣Target Information System |
| TIS➣Terrain Information System |
| TIS➣Total Impervious Surface |
| TIS➣TAC Information System |
| TIS➣Terminal Indicate Secondary |
| TIS➣Transport and Infrastructure Services (Australia) |
| TIS➣Target Image Simulator |
| TIS➣Terminal Interface System |
| TIS➣Trans-Impedance Stage |
| TIS➣Tentative Interference Subtraction |
| TIS➣Target Investing Consulting |
| TIS➣Tube Ion Source |
| TIS➣Tennessee Insurance Service Inc. |
| TIS➣Textile Information System (Pty) Ltd |
| TIS➣Travel Integrated System |
| TIS➣Test Item Simulator |
| TIS➣Timer Interrupt Switch |
| TIS➣Test Instruction Sheet |
| TIS➣Tauranga Intermediate School (New Zealand) |
| TIS➣Transfer in Storage (textile industry) |