| Abbreviation | Definition |
|---|---|
| HPWG | Hyrax Permissions Working Group |
| HWG | Health Working Group |
| HWG | Hurricane Working Group |
| IAWG | Indigenous Affairs Work Group |
| IAWG | Industry Accounting Working Group |
| IAWG | Inter agency Working Group |
| IAWG | International Affairs Working Group |
| ICWG | Illinois Cuba Working Group |
| ICWG | Inter Country Working Group |
| ICWG | Interactive Classroom Working Group |
| IEWG | Indigenous Engagement Working Group |
| IEWG | International Elbow Working Group |
| IEWG | International Endurance Work Group |
| IEWG | International Expert Working Group |
| IMISWG | Inter Ministerial Invasive Species Working Group |
| IMISWG | Inter Ministry Invasive Species Working Group |
| IMWG | Information Management Working Group |
| IMWG | International Melanoma Working Group |
| IMWG | International Myeloma Working Group |
| ITF | International Transport Workers' Federation |