cylinder
n.
A regular shape with a circular base and with sides at right angles to the base.
Audiovisual RecordsA sound recording format.
ComputingIn a multiplatter hard drive, the set of tracks on all platters sharing the same distance from the hub.
Notes
The cylinder2 format was invented by Thomas Edison in 1877-1878. It could hold between two and four minutes of sound. In addition to its use for commercial entertainment, the Dictaphone Company used the format in early machines for dictation and transcription.
