A ditical memory device consisting of a flat disk covered with a magnetic coating on which information is stored; a hard disk, floppy disk, and diskette are typically magnetic disks.
A computer disk enclosed in a protective case (hard disk) or jacket (floppy disk) and coated with a magnetic material that permits flux changes on many small sections (magnetic domains) of the disk surface. Flux changes are changes in magnetic polarity and are used to encode information in binary form (one polarity equals 1, the opposite equals 0). The changes are produced at high speed by the read/write head of the disk drive as it passes over the surface of the disk. Because of its properties, a computer disk should be protected from exposure to sources of magnetism, which can damage or destroy the information it holds.
a platter used for storing data magnetically that can be in the form of a hard disk or a floppy disk; widely used with microcomputers.