| ITSA | Ibm Tivoli Switch Analyzer 
| Others |
| ITSA | Ibm Tivoli System Automation
| Others |
| ITSA | Income Tax Self Assessment
| Others |
| ITSA | Independent Testing Service of Australia
| Others |
| ITSA | Information Technician Seaman Apprentice
| Others |
| ITSA | Information Technology and Security Academy
| Others |
| ITSA | Information Technology Security Awareness
| Others |
| ITSA | Information Technology Services Agency
| Others |
| ITSA | Information Technology Student Association
| Others |
| ITSA | Information Technology Students Association-(ask vvu - tc)
| Others |
| ITSA | Information Technology Support Associate
| Others |
| ITSA | Insolvency and Trustee Service Australia
| Others |
| ITSA | Institute for Traffic Safety Analysis
| Others |
| ITSA | Instructional Technology Student Association
| Others |
| ITSA | Intelligent Transportation Society of America
| Others |
| ITSA | Inter Tribal Student Association
| Others |
| ITSA | Interactive Travel Services Association
| Others |
| ITSA | Interactive Tutor Self Assessment
| Others |
| ITSA | International Training and Simulation Alliance
| Others |
| ITSA | Isuzu Truck South Africa
| Others |