| Acronym | Definition |
|---|
| HdM | Hochschule der Medien (Stuttgart Media University, Germany) |
| HdM | Hoyo de Monterrey (cigars) |
| HdM | High Density Memory (various companies) |
| HdM | Hull Daily Mail |
| HdM | Heidelberger Druckmaschinen |
| HdM | Hearst Digital Media |
| HdM | Help Desk Management |
| HdM | Health Data Management |
| HdM | High Speed Database Machine |
| HdM | Hardware Displacement Mapping |
| HdM | Half Duplex Mode |
| HdM | House Dust Mite |
| HdM | His Dark Materials (game; book by Philip Pullman) |
| HdM | Honda de Mexico (car manufacturer) |
| HdM | Highway Design Manual |
| HdM | Hot Dark Matter |
| HdM | Help Desk Manager |
| HdM | Hardware Device Module |
| HdM | Highway Development and Management |
| HdM | Housing Development Management (Sweden) |
| HdM | Highway Design and Maintenance |
| HdM | High Definition Media (Blu-ray and HD-DVD) |
| HdM | Hierarchical Development Methodology |
| HdM | Harmonisation of Digital Markets (EU) |
| HdM | Haus des Meeres (Vienna, Austria) |
| HdM | Hypermedia Design Methodology |
| HdM | Hidden Dynamic Model (acoustic-phonetic modeling) |
| HdM | Honest Direct Message (social media) |
| HdM | Hydrodemetallization |
| HdM | Highway Design and Management |
| HdM | Haagsche Delftsche Mixed (Nederland, Hockeyclub Den Haag) |
| HdM | Happydeadmen (band) |
| HdM | Handoff Direction Message |
| HdM | Heavy Duty Macadam (civil engineering) |
| HdM | Harvard Design and Mapping Company, Inc. |
| HdM | Health Surveillance and Disease Management |
| HdM | Hardware Driver Module |
| HdM | Hypothetico-Deductive Method |
| HdM | Head Decision Maker |
| HdM | Haagsche Delftse Mixed (Dutch) |
| HdM | Horizontal Drive Mechanism (automotive) |