| Acronym | Definition |
|---|
| IGSS➣Instituto Guatemalteco de Seguridad Social (Spanish: Guatemala Social Security Institute) |
| IGSS➣Inspection Générale de la Sécurité Sociale (French: General Inspectorate of Social Security; Luxembourg) |
| IGSS➣International Graduate School in Sociology (Bielefeld University; Bielefeld, Germany) |
| IGSS➣International Graduate Summer School in Librarianship and. Information Science (Aberystwyth, Wales, UK) |
| IGSS➣Integrated Global Studies School (New Trier Township High School; Illinois) |
| IGSS➣Interactive Graphical SCADA System (Software) |
| IGSS➣Interim Geographic Support System |
| IGSS➣Illinois Ghost Seekers Society (Peoria, IL) |