HD
From Free net encyclopedia
HD may refer to:
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Science and technology
- Hard disk, or hard drive, a type of computer storage hardware (also HDD for hard disk drive)
- Henry Draper Catalogue, a sequential numbering system for stars ordered by right ascension
- High definition television
- HD DVD, high definition DVD
- High Density, in reference to a floppy disk or other magnetic media
- Hybrid drive, a type of notebook hard drive that utilizes a large buffer
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Role Playing Games (primarily Dungeons and Dragons):
- Hit Dice how many dice of hit points your character has, an indication of his or her health and durability.
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Business
- Harley-Davidson, an iconic American motorcycle manufacturer
- Home Depot, a chain of home improvement warehouse retailers
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Medicine
- Attention-deficit hyperactivity disorder, known as Hyperactivity Disorder (HD), as in AD/HD
- Hodgkin's disease
- Hormone disruptor
- Huntington's disease
- HD, a human gene that makes a protein called huntingtin which plays an important role in Huntington's disease
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Other
- Higher Diploma, an academic award.
- Hilda Doolittle, also known as H.D., American poet
- Mustard gas