(mathematics) A set of points on a plane whose distance from a given point is less than or equal to one.

Alternative form of Nipkow disk

plural of Nipkov disk

plural of unit disk

(computing) A hard drive or hard disk; a fixed disc drive containing rigid disks.

(computer hardware) A floppy drive; a disk drive for floppy disks.

plural of hard disk drive

plural of floppy disk drive

plural of optical disk drive

plural of fixed disk drive