HD
- HD
- (i) Henry Draper (star catalogue)
- Hull-Down (armoured vehicle target, as opposed to Fully Exposed)
- High Definition
- HDD
- (i) Hard Disk Drive
- High-Density Disk
- HDL – (i) High-Density Lipoprotein
- HDM – (i) Human Decision-Making
- HDMI - High Definition Multimedia Interface
- HDR
- (i) Hard disk recorder
- Henningson, Durham & Richardson (founders of the engineering and construction firm now known by their initials)
- High dynamic range, a term used in both digital imaging and 3D rendering
- Hot Dry Rock (experimental geothermal technology)
- Human Development Report (UN publication)
- HDRA – (i) Henry Doubleday Research Association
- HDTV – (p) High-Definition Television
Read more about this topic: List Of Acronyms And Initialisms: H