Disk or Diskette
Storage media for computer data. Disk refers to an individual platter constructed of a metal alloy which contains tracks cut into the platter so that a magnetic head can read or write on it. Diskettes are mainly constructed of a vinyl or plastic covered with a cardboard jacket. It also contains tracks. In both cases, the surfaces are magnetically coated. Information is recorded on circular tracks. Disks rotate like a phonograph record.