| Abbreviation | Definition |
|---|---|
| HMSN | Hereditary Motor and Sensory Neuropathy |
| HMSO | Her Majesty's Stationery Office |
| HMSP | Hazardous Materials Safety Permit |
| HMST | Hazard Mitigation Survey Team |
| HMSW | Hazardous Materials / Solid Waste |
| HMSZ | Hydrate Meta-Stability Zone |
| HMT | Hindustan Machine Tools |
| HMT | Hindustan Machine Tools |
| HMU | Hardware Mockup |
| HMV | Hydrogen Manual Valve |
| HN | High Nitrogen |
| HNAB | HexaNitroAzoBenzene |
| HNAC | Heymann Nephritis Antigenic Complex |
| HNAD | Atopic Dermatitis of the Head and Neck |
| HNAG | Household Non-AGriculture |
| HNAN | Heterotrophic NANoflagellate |
| HNaO | Sodium Hydroxide |
| HNAV | Horizontal Navigation |
| HNC | Higher National Certificate |
| HNC | Holistic Nurse Certified |
| HNP | Herniated Nucleus Pulposus |
| HNP | Hereditary Nephritic Protein |
| HNPCC | Hereditary Nonpolyposis Colorectal Cancer |
| HNV | Has Not Voided |
| HO | Head Office |
| HO | Holmium |
| HO | Hydrogen-Oxygen |
| HOA | Hypertrophic Osteoarthropathy |
| HOB | Head of bed |
| HOD | Head Of Department |
| HOG | Hundreds Of Goofs |
| HOG | Hemophillia of Georgia |
| HOH | Hard Of Hearing |
| HOI | Halo Orbit Insertion |
| HOI | Health Outcomes International |
| HOL | High Order Language |
| HOLC | High Order Language Computer |
| HOM | High Order Multiples |
| HOMS | Hydrological Operational Multipurpose System |
| Hon BDS | Honours Bachelor of Dental Surgery |
| HOP | HOt-work Permit |
| HOPE | Heart Outcomes Prevention Evaluation |
| HOPE | Health Opportunity For People Everywhere |
| HOPE | Healthy Options Pertaining To Elders |
| HOPE | Health Osteoporosis Progestin Estrogen |
| HOPE | Helping Oncology Patients Excel |
| HOPE | High Office Parachute Escape |
| HOPP | Hepatic Occluded Portal Pressure |
| HOR | Human Olfactory Receptor |
| HOS | Human Operating System |