| Acronym | Definition |
|---|
| AIO➣All in One |
| AIO➣Adventures in Odyssey |
| AIO➣Assistent in Opleiding |
| AIO➣Associazione Italiana Odontoiatri |
| AIO➣Audio Input Output |
| AIO➣Asynchronous Input Output |
| AIO➣Aquittement Input Output |
| AIO➣Amerta Indah Otsuka (Indonesia) |
| AIO➣Adapt, Improvise, Overcome |
| AIO➣Asynchronous Input/Output |
| AIO➣Analog Input/Output |
| AIO➣Attitudes, Interests, Opinions (market research) |
| AIO➣Anthropological Index Online (monthly bibliographic references to over 700 periodicals in the British Museum's Museum of Mankind library) |
| AIO➣Activities, Interests and Opinions |
| AIO➣Amiga Information Online |
| AIO➣Assistant in Opleiding |
| AIO➣All in Order (police reports) |
| AIO➣Acadia Institute of Oceanography |
| AIO➣Air Intelligence Officer |
| AIO➣African Insurance Organization (Cameroon) |
| AIO➣Arctic Iñupiat Offshore, LLC (Mexico) |
| AIO➣Action Information Organization |
| AIO➣Australian Imagery Organisation |
| AIO➣Arecibo Ionospheric Observatory (Puerto Rico) |
| AIO➣Acquisition Integration Office |
| AIO➣Air Interdiction Officer |
| AIO➣Aerospace Information Operations |
| AIO➣Assistant Immigration Officer |
| AIO➣Advances In Osteoporosis |
| AIO➣Asset Identification Officer (US Air Force) |