| IETC | Illawarra Employment and Teaching Centre 
| Others |
| IETC | Illinois Education and Technology Conference
| Others |
| IETC | Illinois Employment Training Center
| Others |
| IETC | In Extremis Theater Company
| Others |
| IETC | Independent earner tax credit
| Others |
| IETC | Industrial Energy Technology Conference
| Others |
| IETC | Innovative Electrical Testing Construction
| Others |
| IETC | Innovative Engineering Inc.
| Others |
| IETC | Institute Effective Teaching Committee
| Others |
| IETC | International Educational Technology Conference
| Others |
| IETC | International Engineering Technology Consulting
| Others |
| IETC | International Environmental Technology Centre
| Others |
| IETC | International Evaluation and Training Corporation
| Others |