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Asynchronous
A method of data transmission in which one device sends data
one bit at a time to another device. This method allows for
delays of any length between characters.
AUTOEXEC.BAT file
A special kind of batch file MS-DOS executes automatically
each time you turn on or reset the computer.
Backlighting
The internal fluorescent illumination of the computer’s LCD
screen. LCD screens that are not backlit are not legible without
an external source of light.
Backlight period
The length of time your LCD screen stays illuminated in the
absence of keyboard activity. To restore backlighting to your
screen after the backlight period has elapsed, press any key. To
change the backlight period, run the SETLCD program (see
Chapter 2).
Backup
A copy of a program, data file, or disk, kept in case the original
is damaged or lost.
Batch file
A text file containing one or more MS-DOS commands, each
stored on a separate line. You use batch files to automate
MS-DOS operations. When you type the name of the batch file
(with or without its .BAT extension), each command in the file
executes in sequence.
2
Glossary