| Abbreviation | Definition |
|---|---|
| HNM | Helicopter Noise Model |
| HO | Hammer On |
| HO | Handling Options |
| HO | High Occupancy |
| HO | Hood Open |
| HOA | Hand Off Automatic |
| HOB | Hang On the Back |
| HOG | Harley Owner's Group |
| HOH | Highway Of Heroes |
| HORTOL | Horizontal Take-Off and Landing |
| HOT | Hellmann On Time |
| HOU | William P Hobby Airport |
| HOV | Have Overturned Vehicle |
| HOV | Heavy Occupancy Vehicle |
| HOV | High Occupancy Vehicle |
| HOV | High Occupancy Vehicles |
| HOV | High Occupant Vehicle |
| HOV | High Occupany Vehicle |
| HOV | High Octane Vehicle |
| HOV | Highway Operating Vehicle |