| ITRC | Identity Theft Resource Center 
| Others |
| ITRC | Indian Texological Research Centre
| Others |
| ITRC | Industrial Toxicology Research Centre
| Others |
| ITRC | Information Technology Requirements Council
| Others |
| ITRC | Information Technology Resource Center
| Others |
| ITRC | Information Technology Robot Control
| Others |
| ITRC | Infrastructure Transitions Research
| Others |
| ITRC | Instructional Technology Resource Center
| Others |
| ITRC | Instructional Technology Resource Centre
| Others |
| ITRC | International Training and Research Center
| Others |
| ITRC | International Transformational Resilience Coalition
| Others |
| ITRC | International Tripartite Rubber Council
| Others |
| ITRC | International Tuberculosis Research Center
| Others |
| ITRC | International Turfgrass Research Conference
| Others |
| ITRC | Interstate Technology and Regulatory Council
| Others |
| ITRC | Interstate Technology Regulatory Council
| Others |
| ITRC | Iowa Terminal Railroad Company, Charles City Division
| Others |
| ITRC | Iran Telecom Research Center
| Others |
| ITRC | Iran Telecommunication Research Center
| Others |
| ITRC | Irish Tarmac Rally Championship
| Others |