| ITTS | Implementing Transnational Telemedicine Solutions 
| Others |
| ITTS | Inertial Target Tracking System
| Others |
| ITTS | Information Technology and Telecommunications Services
| Others |
| ITTS | Information Technology Telecommunication Services
| Others |
| ITTS | Innovative Tactical Training Solutions
| Others |
| ITTS | Institute for Trade and Transportation Studies
| Others |
| ITTS | Instruction Targeted for TABE Success
| Others |
| ITTS | Instrumentation, Targets, and Threat Simulator
| Others |
| ITTS | International Tactical Training Seminars
| Others |
| ITTS | International Testing Training Services
| Others |
| ITTS | International Trade Transaction Solution
| Others |
| ITTS | Inventory of Teacher Technology Skills
| Others |