| Acronym | Definition |
|---|
| ITSA | Intelligent Transportation Society of America |
| ITSA | Ibm Tivoli Switch Analyzer |
| ITSA | Ibm Tivoli System Automation |
| ITSA | Interactive Travel Services Association |
| ITSA | Information Technology Systems Administrator (various schools) |
| ITSA | Isuzu Truck South Africa (vehicles) |
| ITSA | International Transportation Safety Association |
| ITSA | Information Technology Services Agency (UK government) |
| ITSA | Information Technology Strategy & Architecture |
| ITSA | Information Technology Students Association (various locations) |
| ITSA | International Travel Services Association |
| ITSA | Independent Tank Storage Association |
| ITSA | Iterative Two-Step Approach |
| ITSA | Information Technology Support Activity |
| ITSA | Institute for Telecommunications Sciences & Aeronomy |