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A standard serial interface. You can easily connect an RS-232C
compatible device to your computer.

A contiguous section of a disk track that provides an address at which

the computer can access data.

The diagnostics procedure the computer performs to check its hardware

whenever you turn on or reset the computer.

The type of interface that transmits data one bit at a time. See also

and 

The programs that enable the computer to perform the tasks and

functions you indicate.

A signal sent in serial communications to mark the end of a character.

A directory or group of files that branches down from another
subdirectory or from the root directory.

An option added to an MS-DOS command that redirects the way the

command works. Switches must be preceded by a / (forward slash). For

example, if you add the /S switch to a FORMAT command, MS-DOS

installs the operating system on a diskette as it formats it.

A diskette that contains the operating system.

Addressable, concentric circles on a diskette, resembling the grooves on

a record, which divide the diskette into separate accessible areas. There
are 80 tracks on each side of a double-sided, double-density diskette.