(computing) A copy of all or part of a disk drive retained for backup or replication purposes.

(computer hardware) A computer drive that reads disks.

(computing) A computer disk holding a bootstrap loader and an operating system.

(computing, dated) An 8-inch or 5.25-inch floppy diskette having storage capacity on both sides, and needing to be removed from the drive, flipped over and reinserted in order to access the other side.

Alternative spelling of optic disc

plural of disk drive

plural of disk image

(computing) a virtual disk, implemented in software, that stores its contents in RAM.

The hyperbolic plane, viewed as a disk so that Euclidean circles and lines Euclidean-perpendicular to the disk's surface are hyperbolic lines.

(computing) A disk of the kind that can be read and written by a Zip drive.