| Acronym | Definition |
|---|
| JAS | James |
| JAS | Journal of Animal Science |
| JAS | Just a Suggestion |
| JAS | Journal of Agricultural Science (Canadian Center of Science and Education) |
| JAS | Japanese Association, Singapore |
| JAS | Journal Abbreviation Sources |
| JAS | Jazz Aspen Snowmass (Aspen, CO) |
| JAS | Journal of African Studies (Society of Research on African Cultures) |
| JAS | Japan Air System |
| JAS | Japan Atherosclerosis Society |
| JAS | Japan Audio Society (est. 1952) |
| JAS | Justice at Stake (Washington, DC) |
| JAS | Journal of Applied Statistics (Taylor and Francis Group) |
| JAS | Java Analysis Studio |
| JAS | Journal of Archaeological Science |
| JAS | Japanese Agricultural Standard |
| JAS | Just A Second |
| JAS | Jordanian Astronomical Society (Amman, Jordan) |
| JAS | Jamaica Agricultural Society |
| JAS | Journal of the Atmospheric Sciences |
| JAS | Jet Air Service (freight forwarding company) |
| JAS | Jamaica AIDS Support |
| JAS | Jabatan Alam Sekitar (Malaysia) |
| JAS | Java Application Server |
| JAS | Jakt, Attack, Spaning (Swedish Military Aircraft) |
| JAS | Janus Aspen Series (investments) |
| JAS | Japan Association of Surveyors |
| JAS | Joint Analysis System |
| JAS | Japan Airship Services |
| JAS | Japanese Amateur Satellite |
| JAS | Joint Alternate Site |
| JAS | Joined Another Society (Quaker religion) |
| JAS | Justice and Society |
| JAS | Japan Aerobatic School |
| JAS | Jedi Against Sith (gaming clan) |
| JAS | Jaish Ansar Al-Sunna (Islamist Armed Groups in Iraq) |
| JAS | Job Accounting System |
| JAS | Johnson Associates Software |
| JAS | Journaling Automation System (IBM) |
| JAS | Join and Stream (video networks) |
| JAS | Jharkhand Administrative Service (India) |
| JAS | Japan Aerobatic Academy |
| JAS | JAG Automated System |
| JAS | Junior Accountants Society (University of Guam) |