Double-density

A type of diskette format that allows you to store twice as much data as the standard-density format. A 3.5-inch, double-density diskette can store 720KB of data. A 5.25-inch, double-density diskette can store 360KB of data.

EGA

Enhanced Graphics Adapter. A display adapter card that allows you to display high-resolution graphics on an EGA monitor. It can display up to 43 lines of text with 80 characters on each line, or it can display monochrome or lbcolor graphics at resolutions up to 640 x 350.

Expanded memory

Memory that specially-written MS-DOS programs can use when an expanded memory manager program maps that memory into an accessible area. See also Memory manager.

Extended memory

Memory above 1MB that is accessed by 386 or 486 microprocessors when they are operating in protected or virtual mode. This memory is available to OS/2 programs, but is available to MS-DOS only if an extended memory manager program is installed. See also Expanded memory and OS/2.

Format

To prepare a new disk (or an old one you want to reuse) so that the data you store on it can be used by your operating system. Formatting divides a disk into tracks and sectors and creates addressable locations where your operating system can find the data.

6Glossary