| Acronym | Definition |
|---|
| AEIOU | Any Easy Intimacy (book) |
| AEIOU | Alles Erdreich Ist Österreich Untertan (Austria Is to Govern the World) |
| AEIOU | Austriae Est Imperare Orbi Universo (of Austria is to Govern all the World) |
| AEIOU | Autism Early Intervention Outcomes Unit |
| AEIOU | Austria Erit in Orbe Ultima (Austria Will Exist for Ever) |
| AEIOU | Annotierbares Elektronisches Interaktives Oesterreichisches Universal-Informationssystem (German: Annotatable Electronic Interctiv Universal Information System; Austrian Federal Ministry for Education, Science and Culture ) |
| AEIOU | Alliance Ecological Interplanetary Observation Union |
| AEIOU | Address Extension by IP Option Usage |
| AEIOU | Achieving Excellence in Our University |
| AEIOU | Applied Epi Info for Occupational Use |
| AEIOU | Alternative Exhibition Information of the Universe |
| AEIOU | Absolute/Axiomatic, Emotional/Ego/Experienced, Improvable truths, Observed, Unique truth (logic framework) |
| AEIOU | An Elephant in Orange Underwear (vowel mnemonic) |
| AEIOU | Associação de Enxadristas Intergalácticos Onicolores e Unívocos (Portugese) |
| AEIOU | Annotable Elektronic Interactive Oesterreich Universal Information System |
| AEIOU | Achieving Excellence In Our Uniqueness (retirees) |