Personal Computer User Manual

DOS
The Disk Operating System that controls the computer’s input
and output functions. See Operating system.
Double-density
A type of diskette format that allows you to store twice as much
data as the standard-density format. A 3 l/z-inch double-density
diskette can store 720KB of data. A 5 ‘/+inch double-density
diskette can store 360KB of data.
Drive designator
The letter name of a disk drive, followed by a colon-for
example, C :.
EGA
Enhanced Graphics Adapter. A type of display adapter card that
allows you to display high-resolution graphics on a color
monitor. It can display up to 43 lines of text with 80 characters
on each line, or it can display monochrome or 16-color graphics
at up to 640 x 350 resolution.
Executable file
A file containing program instructions, as opposed to data
created with an application program. An executable file has the
extension .BAT, .COM, or .EXE.
Expanded memory
Memory that specially-written MS-DOS application programs
can use with an Expanded Memory Specification (EMS) device
driver such as EMM386.SYS. Expanded memory does not fill a
certain range of memory like conventional and extended
memory; expanded memory can be mapped from the memory
area between 640KB and 1MB.
8
Glossary