From Wikipedia, the free encyclopedia
|This article does not cite any sources. (December 2009) (Learn how and when to remove this template message)|
Single density, often shortened SD, is a capacity designation on magnetic storage, usually floppy disks. It describes the use of an encoding (or modulation) of information using Frequency modulation, also known as biphase mark code.
|This computer-storage-related article is a stub. You can help Wikipedia by expanding it.|