| Acronym | Definition |
|---|
| IIAS | International Institute for Advanced Studies (Kyoto, Japan) |
| IIAS | International Internet Associate Symposium |
| IIAS | International Internet Advertising Services |
| IIAS | Inventory Information Approval System |
| IIAS | Indian Institute of Advanced Study |
| IIAS | International Institute of Administrative Sciences |
| IIAS | International Institute of Asian Studies (Leiden and Amsterdam, Netherlands) |
| IIAS | Istituto Italiano Alimenti Surgelati (Italian: Italian Frozen Food Institute) |
| IIAS | International Internet Advertising Services (Abbotsford, British Columbia, Canada) |
| IIAS | International Institute of American Studies (est. 1958; Doshisha University; Japan) |