| Acronym | Definition |
|---|
| ISOS➣IP (Internet Protocol) Service Operating System |
| ISOS➣In Search of Sunrise (Dj Tiesto song) |
| ISOS➣Illinois Secretary of State |
| ISOS➣Iowa Secretary of State (Des Moines, IA) |
| ISOS➣Isosceles |
| ISOS➣Intelligence Service Oliver Strachey (UK) |
| ISOS➣In Search Of Space |
| ISOS➣Inspection Service Operation Support (US Postal Service) |
| ISOS➣Intercall Switch Operating System |
| ISOS➣Institute for State Organisational Sciences (Vietnam) |
| ISOS➣Invitation to Submit Outline Solution (UK) |