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HD may refer to:
Academia
Business
Medicine
People
Places
- The HD postcode area, covering Huddersfield, Brighouse and Holmfirth in England, UK
Science and technology
- Hard drive, a computer device which stores digitally encoded data, also known as HDD
- Henry Draper Catalogue, a sequential numbering system for stars ordered by right ascension
- High-definition, in reference to high-definition video, high-definition television (HDTV), or Intel High Definition Audio
- High density, in reference to a floppy disk, other magnetic media or the optical formats HD DVD and Blu-ray
- Hybrid drive, a type of notebook computer hard drive that utilizes a large buffer
- Hydrogen deuteride, a diatomic compound of hydrogen and deuterium
- HD Radio, an abbreviation from the term Hybrid Digital/analog radio
- HD Photo, an image format
- the chemical warfare agent sulfur mustard, which in its distilled form is referred to as HD
Other
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