| Acronym | Definition |
|---|
| HMO | Health Maintenance Organization |
| HMO | House in Multiple Occupation (UK) |
| HMO | Health Management Organization |
| HMO | Home Media Option (TiVo) |
| HMO | Hadassah Medical Organization (Israel) |
| HMO | Hermanus Magnetic Observatory |
| HMO | Hear Me Out (chat) |
| HMO | Healthcare Maintenance Organization |
| HMO | Hermosillo, Sonora, Mexico - General Ignacio Pesqueira Garcia (Airport Code) |
| HMO | Healing Music Organization |
| HMO | Hand Money Over |
| HMO | Hibbert Moneymaking Organization (The Simpsons cartoon) |
| HMO | Habitat Module Outfitting |
| HMO | Hazardous Materials Operation(s) |
| HMO | Heavy Machine Operator |
| HMO | Hydro Mechanical Obliteration (Colson's weed removal by high-pressure water jet) |
| HMO | High Mobility Operations |