| Indian Administrative Service |
Government |
IAS |
| Islamic World Academy of Sciences |
Science |
IAS |
| Institute for Advanced Study |
Science |
IAS |
| Iowa Archeological Society |
Science |
IAS |
| Iranian Arachnological Society |
Science |
IAS |
| Institute of Agricultural Sciences |
Science |
IAS |
| Institute of Advanced Study |
Science |
IAS |
| IEEE Industry Applications Society |
Science |
IAS |
| International Accounting Standards |
Finance |
IAS |
| Finance |
Investment Analysts Society of Southern Africa |
IAS |
| International Financial Reporting Standards |
Finance |
IAS |
| International AIDS Society |
Health |
IAS |
| Internal anal sphincter |
Health |
IAS |
| International Association of Scientologists |
Religion |
IAS |
| International Association of Sufism |
Religion |
IAS |
| Institute for Anarchist Studies |
Politics |
IAS |
| Immunisation Awareness Society |
Politics |
IAS |
| Indicated airspeed |
Aeronautics |
IAS |
| Institute of Aerospace Sciences |
Aeronautics |
IAS |
| IAS Cargo Airlines |
airline |
IAS |
| Instituto Ayrton Senna |
NGO |
IAS |
| International Automated Systems |
Company |
IAS |
