JS
- JSAF – (a) Joint Semi-Automated Forces ("jay-saff")
- JSAP – (i) Japan Society of Applied Physics
- JSCSC – (i) Joint Services Command and Staff College
- JSD – (i) juris scientiae doctor (Latin, "doctor of science of law")
- JSEAD – (i) Joint Suppression of Enemy Air Defence (see SEAD)
- JSF – (i) Joint Strike Fighter
- JSIMS – (p) Joint Simulation System
- JSOA – (i) Joint Special Operations Area
- JSOTF – (i) Joint Special Operations Task Force
- JSP – (i) JavaServer Page
- JSR – (i) Java Specification Request
- JSS – (i) Joint Support Ship Project
- JSTARS – (p) Joint Surveillance Target Attack Radar System ("djay-starz")
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