| Abbreviation | Definition |
|---|---|
| JT | Japanese Teacher |
| JTFCEM | Joint Task Force Contingency Engineer Manager |
| JTO | Job Training Office |
| JTO | Junior Telecom Officer |
| JUB | Junior Under Barstaff |
| JV | Jesuit Volunteer |
| JVA | Job Vacancy Announcement |
| JVS | Jewish Vocational Service |
| JWO | Junior Watch Officer |
| JWSD | Java Web Service Developer |
| K | Kaiser |
| K | Knowledge |
| KA | Knight Alpha |
| KAP | Korean American Princess |
| KBK | Knight Bridging Korean |
| KE | Knowledge Engineer |
| KEC | Kraft Export Consultant |
| KERA | Kentucky Early Retirement Act |
| KEY | Kiwanis Educated Youth |
| KEYS | Keep Earning Your Success |