IBM 5155 Manual To Operations page 436

data. All information entered into or used by the
computer.
diagnostic. Pertaining to the detection and isolation of a
malfunction or mistake.
diagnostic diskette. A diskette used by computer users
and service personel to diagnose hardware problems.
diskette. A thin flexible, magnetic disk and a semi-rigid
protective jacket, in which the disk is permanently
enclosed.
diskette drive. A device that uses diskettes for storage
and retrieval of data.
DOS. Disk Operating System. A program that
interacts with the processor and the disk or diskette
drive to control the flow of data.
fixed disk. A disk of rigid material with a magnetic
coating, used for mass storage and retrieval of data.
formatting. The preparation of a disk or diskette for use
by the computer.
formatted disk/diskette. A disk/diskette that can be
used by the computer for the storage of data.
graphic character. A character, other than a control
character, that is normally represented by a symbol.
joystick. For the IBM Portable Personal Computer, a
~
user-supplied device that connects to the Game Control
Adapter.
Glossary-2