| Acronym | Definition |
|---|
| OHI | Oral Health Initiative (various organizations) |
| OHI | Other Health Insurance |
| OHI | Omron Healthcare, Inc. (Bannockburn, IL) |
| OHI | Optimum Health Institute (various locations) |
| OHI | Other Health Impaired |
| OHI | Oracle Health Insurance |
| OHI | Oman Holdings International (various locations) |
| OHI | oral hygiene instruction |
| OHI | Organization Health Index (various organizations) |
| OHI | Oral Hygiene Index |
| OHI | On-Hand Inventory |
| OHI | Organizational Health Inventory (USA) |
| OHI | Oil Heat Institute |
| OHI | Ocotillo Herpetofauna & Invertebrates (El Paso, TX) |
| OHI | Open Humanoid Initiative |
| OHI | Ordnance Handling Instructions (US Navy) |
| OHI | Obsolete Hardware Interface |
| OHI | One-Horn Interferometer |
| OHI | Ocala Heart Institute |
| OHI | Overhaul Instruction (USAF) |
| OHI | Ordnance Handling Instruction |
| OHI | On-Hold Infosystems |
| OHI | Operation Handicap International (France) |