| Acronym | Definition |
|---|
| ISSA➣International Social Security Association |
| ISSA➣Information Systems Security Association |
| ISSA➣International Sports Sciences Association |
| ISSA➣International Securities Services Association |
| ISSA➣International Slurry Surfacing Association |
| ISSA➣International Sanitary Supply Association |
| ISSA➣Inter-Secondary School Sports Association (Jamaica) |
| ISSA➣International Ship Suppliers Association |
| ISSA➣International Strategic Studies Association |
| ISSA➣Interservice Support Agreement |
| ISSA➣International Space Station Alpha |
| ISSA➣International Step by Step Association (Amsterdam, The Netherlands) |
| ISSA➣IRAS Sky Survey Atlas |
| ISSA➣International Senior Softball Association |
| ISSA➣Information Systems Security Architecture |
| ISSA➣International Sociology of Sport Association |
| ISSA➣India Specific Safeguards Agreement (inspections) |
| ISSA➣International Society of Securities Administrators |
| ISSA➣International Skateboard Slalom Association |
| ISSA➣Illini Secular Student Alliance (University of Illinois) |
| ISSA➣Inter Scholastic Sailing Association |
| ISSA➣Information System Security Awareness |
| ISSA➣Institute for Systems Studies and Analyses (India) |
| ISSA➣Irish Student Sport Association |
| ISSA➣International Space School Alumni Association |
| ISSA➣Installation Supply Support Activity |
| ISSA➣Illustrissimus Senatus Studiosorum Amstelodamensium |
| ISSA➣Installation Services Support Agreement |
| ISSA➣Interim Software Support Activity |
| ISSA➣Industrial Security Staff Approval (US security clearance) |
| ISSA➣Informationsstelle Südliches Afrika eV |
| ISSA➣Interservice Supply Support Agreement |