English abbreviations from ohio to oi
- OHIO (Old Hearts Inspiring Others)
- OHIP (Ontario Health Insurance Plan)
- OHL (Office Hours Live)
- OHMS (On Her Majesty's Service)
- OHN (Operation Healthy Neighborhoods)
- OHNS (Ocupational Health aNd Safety)
- OHO (Okhotsk Airport)
- OHP (Observatoire de Haute-Provence)
- OHPA (Oak Hill Park Association)
- OHPCO (Ohio Hospice and Palliative Care Organization)
- OHQ (Operational HeadQuarters)
- OHR (Office of Human Resources)
- OHRRPGCE (Official Hamster Republic Role Playing Game Construction Engine)
- OHS (Ordinary Human Spirit)
- OHSA (Ohio High School Athletic Association)
- OHSAA (Ohio High School Athletic Association)
- OHSAS (Ohio Hot Stove Baseball)
- OHSS (Ovarian Hyperstimulation Syndrome)
- OHSU (Oregon Health & Science University)
- OHT (Kohat Airport)
- OHTF (Ohio Housing Trust Fund)
- OHTI (Oral History Technical Issues)
- OHU (OHio University (non-standard, usually OU))
- OHW (Old Home Week)
- OHWS (Offensive Hand Weapon System)
- OI (Oxygen Index)