DEBUG: To remove the errors in a computer program.

DIAGNOSTIC: A program for detecting and isolating a problem or mistake in the computer system; features that allow systems or equipment to self-test for flaws.

DISK: A revolving plate on which data and programs are stored. Also called DISKETTE.

DISK DRIVE: A part of the computer system that reads and writes material on the disk. It can be part of the main hardware or a peripheral attached to the system.

DOCUMENTATION: 1. The instruction manual for a program (software) or piece of hardware. 2. The process of describing a computer program so others using the program can see how it works.

DOWNTIME: Any time a computer is not available or not working because of a machine fault or failure. Downtime includes repair delay time, repair time, and machine-spoiled work time.

EDIT: To change or add data to an existing document or program.

FLOPPY DISK: A small, flexible storage device made of magnetic material. It looks like a soft phonograph record and is usually 5¼ inches or 8 inches in diameter.

FORTRAN (FORmula TRANslation): A computer language widely used to solve scientific and engineering problems, mainly for large commercial systems.

GARBAGE: Meaningless information.