Updated: 08/31/2020 by Computer Hope

HD may refer to any of the following:


1. HD is an initialism used for hard drive, although you may also see it written as "HDD" for hard disk drive.

2. Short for high definition, HD is used to describe a standard of digital video or audio. For video, it means 1280 x 720 pixels, or 720p on televisions. See the HDTV definition for further information and related links.

For audio, HD means sound with 16-bit depth and at least a 44.1 kHz sampling rate.

3. Short for high density, HD is a type of floppy diskette. See our high-density disk definition for further information.

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