| ITSS | Improved Thermal Sight System 
| Others |
| ITSS | Incident Technology Support Specialist
| Others |
| ITSS | Information Technology Security Specialist
| Others |
| ITSS | Information Technology Services and Solutions
| Others |
| ITSS | Information Technology Services and Support
| Others |
| ITSS | Information Technology Shared Services
| Others |
| ITSS | Information Technology Solutions and Services
| Others |
| ITSS | Information Technology Solutions and Support
| Others |
| ITSS | Information Technology Solutions Services
| Others |
| ITSS | Information Technology Strategic Sourcing
| Others |
| ITSS | Information Technology Support Services
| Others |
| ITSS | Information Technology Systems and Services
| Others |
| ITSS | Information Technology Systems Specialist
| Others |
| ITSS | Infotech Storage System
| Others |
| ITSS | Injured Trauma Survivor Screen
| Others |
| ITSS | Instructional Technology Support Services
| Others |
| ITSS | Integrated Tactical Surveillance System
| Others |
| ITSS | Integrated Technology Support Services
| Others |
| ITSS | Integrated Total Security Solutions
| Others |
| ITSS | Intelligent Transportation Society Singapore
| Others |
| ITSS | Intelligent Transportation Systems Society
| Others |
| ITSS | Interactive Transformative Soul Symbols
| Others |
| ITSS | Interdisciplinary Training in the Social Sciences
| Others |
| ITSS | International Tea Sippers Society
| Others |
| ITSS | International Tourism Security Summit
| Others |
| ITSS | International Trade in Services Statistics
| Others |
| ITSS | International Travelling Summer School
| Others |
| ITSS | Inventory Tracking Software System
| Others |