| HDM | Haagsche Delftsche Mixed 
| Others |
| HDM | Half Duplex Mode
| Others |
| HDM | Hamadan, Iran
| Others |
| HDM | Hamburg Dresdner Maschinenfabriken
| Others |
| HDM | Hamilton Device Manager
| Others |
| HDM | Hand Drawn Monkey
| Others |
| HDM | Handoff Direction Message
| Others |
| HDM | Hard Dance Music
| Others |
| HDM | Hard Disk Manager
| Others |
| HDM | Hardware Device Module
| Others |
| HDM | Hardware Direct Monitoring
| Others |
| HDM | Hardware Displacement Mapping
| Others |
| HDM | Harvard Design & Mapping Company, Inc.
| Others |
| HDM | Harvard Design and Mapping
| Others |
| HDM | Harvard Design Magazine
| Others |
| HDM | Hazard Detection Module
| Others |
| HDM | Head Decision Maker
| Others |
| HDM | Head Discor Mod
| Others |
| HDM | Head-Up Display Module
| Others |
| HDM | Health Data Management
| Others |
| HDM | Healthcare Data Management
| Others |
| HDM | Healthcare Delivery and Methodologies
| Others |
| HDM | Heated Door Mirrors
| Others |
| HDM | Helium Distribution Manifold
| Others |
| HDM | Help Desk Management
| Others |
| HDM | Help Desk Manager
| Others |
| HDM | Her Dark Majesty
| Others |
| HDM | Hermandad del Maestrazgo
| Others |
| HDM | HGST Device Manager
| Others |
| HDM | Hierarchical Deterministic Multi
| Others |
| HDM | Hierarchical Development Methodology
| Others |
| HDM | High Definition Microphone
| Others |
| HDM | High Definition Mobile
| Others |
| HDM | High Density Metric
| Others |
| HDM | High Density Modulation
| Others |
| HDM | High Speed Data Module
| Others |
| HDM | High Speed Database Machine
| Others |
| HDM | High-Dose Melphalan
| Others |
| HDM | Highway Data Management
| Others |
| HDM | Highway Design and Maintenance
| Others |
| HDM | Highway Design Manual
| Others |
| HDM | Highway Development and Management
| Others |
| HDM | Hilf Du Mir
| Others |
| HDM | Hill Descent Mode
| Others |
| HDM | His Dark Materials
| Others |
| HDM | Hochschule Der Medien
| Others |
| HDM | Home Delivered Meals
| Others |
| HDM | Home Device Manager
| Others |
| HDM | Honda De Mexico
| Others |
| HDM | Honest Direct Message
| Others |
| HDM | Host Device Management
| Others |
| HDM | Hot Dark Matter
| Others |
| HDM | House Dance Music
| Others |
| HDM | House Dust Mite
| Others |
| HDM | Houston Drilling Management
| Others |
| HDM | Hudson and Manhattan
| Others |
| HDM | Human Design Medical
| Others |
| HDM | Human Development Media
| Others |
| HDM | Human Double Minute
| Others |
| HDM | Hype Da Madman
| Others |
| HDM | Hypergraph Distance Measure
| Others |