| Abbreviation | Definition |
|---|---|
| IWSN | Injured Workers Support Network |
| IWSN | Iranian Workers Solidarity Network |
| IWSN | Iranian Workers' Solidarity Network |
| IWSWU | International Wiring Systems of Workers Union |
| IWSWU | International Wiring Systems Workers Union |
| IWWU | Irish Women Workers Union |
| IYL | Inform You Later |
| IYWN | International Youth Workers Network |
| JATC | Jordan Academy for Technology and Careers |
| JCAT | JCAHPO Career Advancement Tool |
| JCCP | Job Classification And Career Path |
| JCCP | Job Classification Career Path |
| JCDA | Jahnigen Career Development Award |
| JCDC | Job and Career Development Coach |
| JCRI | Jewelry Career Readiness Initiative |
| JCTC | Jessamine Career And Technology Center |
| JCTC | Job and Career Transition Coach |
| JCWN | Japanese Career Women's Network |
| JET | Joint Employment Test |
| JOC | Job Occupation Career |