| Acronym | Definition |
|---|
| IAO➣Fraunhofer-Institut für Arbeitswirtschaft und Organisation |
| IAO➣It's All Over (various organizations) |
| IAO➣International Affairs Office (various organizations) |
| IAO➣In And Out |
| IAO➣Information Awareness Office |
| IAO➣Input Analysis Output |
| IAO➣Indian Astronomical Observatory |
| IAO➣Information Awareness Office (US DARPA) |
| IAO➣Information Assurance Officer |
| IAO➣Incorporated Association of Organists (UK) |
| IAO➣Individual Artists of Oklahoma (Oklahoma City, OK) |
| IAO➣International Astronomy Olympiad |
| IAO➣International Accreditation Organization |
| IAO➣Individual Assistance Officer |
| IAO➣Isis Apophis Osiris (alchemical formula) |
| IAO➣Information Asset Owner (UK) |
| IAO➣International Association for Orthodontics |
| IAO➣Isomerized Alpha Olefin (oil) |
| IAO➣International Affairs Organization (various locations) |
| IAO➣Industry Alliances Office |
| IAO➣Instituto Agronomico per l'Oltremare (Italy) |
| IAO➣International Announcement of Opportunity |
| IAO➣I Am Outtahere |
| IAO➣Irish Association of Orthoptists (vision; Ireland) |
| IAO➣Improvise, Adapt, Overcome |
| IAO➣Institute for Archaeological Oceanography |
| IAO➣Institutional Affairs Office |
| IAO➣Information Activities Office(r) |
| IAO➣Interim Approval to Operate |
| IAO➣Industrial Applications Office |
| IAO➣Inter-Agency Committee on Oceanography |
| IAO➣Independent Artists of Oklahoma |
| IAO➣I Am Online |
| IAO➣Integrated Operations Architecture |
| IAO➣Information and Computer Science (ICS) Alumni Organization (University of California, Irvine) |