| Rank | Abbreviation | Meaning |
|---|
| ***** | IGTC | International Glutamate Technical Committee
| |
| **** | IGTC | Indo-German Training Centre
| |
| **** | IGTC | International Garment Training Centre
| |
| *** | IGTC | Interim Gas Turbine Change
| |
| *** | IGTC | International Generator Technical Community
| |
| *** | IGTC | Inspirational Guidance Track Club
| |
| *** | IGTC | InterGlobal Telecommunications Corporation
| |
| *** | IGTC | International Garment Training Center
| |
| *** | IGTC | Ideal Gas Thermal Capacity
| |
| ** | IGTC | Inertial Guidance Test Center
| |
| ** | IGTC | International Grain Trade Coalition
| |
| ** | IGTC | International Gene Trap Consortium
| |
| ** | IGTC | International Gestalt Training Community
| |
| ** | IGTC | International Gulf Trading Co
| |
| ** | IGTC | International Graduate Training Center
| |
| * | IGTC | International Gas Turbine Conference
| |
| * | IGTC | Inter Governmental Technical Committee
| |
| * | IGTC | Independent Gas Tank Company
| |
| * | IGTC | International Gas Turbine Center
| |
| * | IGTC | Interactive Guide To Colorado
| |
| * | IGTC | Indonesia Grand Touringcar Championship
| |
| * | IGTC | International Gas Turbine Congress
| |
| * | IGTC | Inter Galactic Teleportation Chambers
| |
| * | IGTC | International Gas Transport Consortium
| |
| * | IGTC | Institute for Global Tobacco Control
| |