JSA
JSA is widely used in occupational safety to denote a Job Safety Analysis, a systematic review of workplace hazards. It also appears in popular culture as the Justice Society of America comic team, in diplomatic reports about the Joint Security Area on the Korean peninsula, and as the name of various student or youth organizations.
Miscellaneous
Junior State of America
Just Some Anime
Journal of Substance Abuse
Judaica Sound Archives
Just Superman Already
Jackson Sumner Associates
James Spence Authentication
John Schneider and Associates
Joint Staff Assessment
Joint SIGINT Activity
Journal of Systems Architecture