| Acronym | Definition |
|---|
| AOH | Ancient Order of Hibernians |
| AOH | Always on Hand |
| AOH | After Office Hours |
| AOH | Alliance of Heroes (gaming) |
| AOH | Affidavit of Heirship (estate law; various locations) |
| AOH | Astronomers of Humboldt (California) |
| AOH | Angels of Hell (gaming clan) |
| AOH | Annals of Occupational Hygiene (journal) |
| AOH | Anatomy of Habit (band) |
| AOH | Accepted on Hire |
| AOH | Assembly Operations Handbook (US NASA) |
| AOH | Annual Operating Hour (energy use) |
| AOH | All-optical histology |
| AOH | Association Ostéopathique de l'Hérault (French: Osteopathic Association of Herault; Herault, France) |