| HOI | Halls of Illusions
| Others |
| HOI | Halo Orbit Insertion
| Others |
| HOI | Hands On Information
| Others |
| HOI | Hao Island, Tuamotu Islands, French Polynesia, South Pacific
| Others |
| HOI | Head Of the Institute
| Others |
| HOI | Health Opportunity Index
| Others |
| HOI | Health Outcomes International
| Others |
| HOI | Healthcare Open Innovation
| Others |
| HOI | Heart Of Illinois
| Others |
| HOI | Hearts of Iron
| Others |
| HOI | Hijet Owners Indonesia
| Others |
| HOI | Hoag Orthopedic Institute
| Others |
| HOI | Home Owner Insurance
| Others |
| HOI | Home Owners Insurance
| Others |
| HOI | House Of Ingredients
| Others |
| HOI | House Of Intelligence
| Others |
| HOI | House Of Intuition
| Others |
| HOI | Housing Opportunity Index
| Others |