JSS explained

JSS may refer to:

Military

Joint Security Stations, components of 2007's Operation Imposing Law in Iraq
Joint support ship, a multi-role naval vessel
Joint Surveillance System, a USAF and FAA system for the atmospheric air defense of North America
Protecteur-class auxiliary vessel (previously the Joint Support Ship Project), naval auxiliaries for the Royal Canadian Navy

Janathipathiya Samrakshana Samithy, a political party in the Indian state of Kerala
Japan Statistical Society, a learned society in Japan
Jönköpings SS, a Swedish swimming club
Joyson Safety Systems, an American automotive safety systems company

James Striar School of General Jewish Studies
Japanese School of Suzhou, a Japanese international school in China
Jurong Secondary School, a government secondary school in Taman Jurong, Singapore

Jet Stream International (airline code: JSS), a Pakistani airline
Journal of the Siam Society, a scholarly journal published by the Siam Society in Bangkok
"JSS" (The Walking Dead), the second episode of the sixth season of the post-apocalyptic horror television series
Junior Solar Sprint, a competitive program for 5th-to-8th-grade students to create a small solar-powered vehicle
Network Security Services for Java (JSS), a component of the Network Security Services collection of cryptographic computer libraries