| Abbreviation | Definition |
|---|---|
| HLLV | Heavy Lift Launch Vehicle |
| HLO | Health Licensing Office |
| HLQ | High Level Qualifier |
| HLT | Halt |
| HLTL | High Level Test Language |
| HLV | Herpes-Like Virus |
| HLV | Heavy Lift Vehicle |
| HM | Hydrography and Meteorology |
| HM | Heart Murmur |
| HM | Hyper Madness |
| HM | History Makers |
| HMA | Hypergot Maintenance Area |
| HMB | Heavy Menstrual Bleeding |
| HMB | Hardware Management Board |
| HMC | Hypergolic Maintenance and Checkout |
| HMC | Hybrid Microcircuit |
| HMC | Halley Multicolor Camera |
| HMCC | Hypergolic Maintenance and Checkout Cell |
| HMCF | Hypergolic Maintenance and Checkout Facility |
| HMD | Human Motor Development |
| HMD | Helmet-Mounted Display |
| HME | Hereditary Multiple Exostosis |
| HME | Human Monocytic Ehrlichiosis |
| HMF | Human Micro Flora |
| HMF | Hutchinson's Melanotic Freckle |
| HMF | Horizontal Mating Facility |
| HMF | Hypergol Maintenance Facility |
| HMG | Human Menopausal Gonadotrophin |
| HMI | Himalayan Mountaineering Institute |
| HMIP | Her Majesty's Inspectorate of Pollution |
| HMIRC | Hazardous Materials Information Review Commission |
| HMIS | Hazardous Materials Inventory System |
| HMIS | Health Management Information System |
| HMO | Health Maintenance Organization |
| HMO | Health Medical Opportunity |
| HMP | Health and Medical Publications |
| HMP | Hydrozene Monopropeflant |
| HMR | Hazardous Material Regulations |
| HMS | Hybrid Mail Services |
| HMS | Hind Mazdoor Sangh |
| HMS | Health Management System |
| HMS | HyperMobility Syndrome |
| HMS | Highly Migratory Species |
| HMS | Headland Management System |
| HMS | History Memory System |
| HMSA | HyperMobility Syndrome Association |
| HMSA | Hawaii Medical Service Association |
| HMSE | Headache Management Self-Efficacy |
| HMSF | Hazardous Material Storage Facility |
| HMSM | Human Myometrial Smooth Muscle |