Xerox 721 Message Manual page 318

system controller
system
systems specialist
XEROX 4635 LASER PRINTING SYSTEM MESSAGE GUIDE
system 1. In data processing, a collection of parts and procedures
organized to accomplish a set of specific functions. 2. Assembly
of components united by some form of regulated interaction to
form an organized whole. 3. Operations or procedures through
which a business activity is accomplished.
Part of the LPS that provides interfacing capability, data handling,
formatting, buffering, and operator control for the system. Also
referred to as the "ESS"
system disk Magnetic disk storage medium, usually of large capacity, that is
not removable as opposed to floppy disk or disk packs.
system file Master software program that keeps all components working
together.
generation Process whereby the system is made ready to operate. Typically
involves selecting the operative parameters and activating the
relevant software.
system page Maximum area in which text and graphics can be imaged on a
printing system.
system software Software programs that support and/or control system functions
by governing hardware operation and input/output processes,
interpreting source programs and breaking them down into
machine language, distributing tasks among various processors,
and so on.
The person(s) at a customer site responsible for software,
applications, and programming issues.
tab To move the cursor on a display or printer to a prespecified
column on the display or paper, most often by using the <TAB>
key on a keyboard.
tape Recording media for data or computer programs. Tape can be in
permanent form, such as perforated paper tape. Generally, tape
is used as a mass storage medium in magnetic form and has a far
higher storage capacity than disk storage, but it takes longer to
write or recover data from tape than from disk.
tape density The number of characters that can be stored on magnetic media,
such as how close together data can be recorded. The Xerox
LPS may use either 1600 bpi or 6250 bpi density magnetic media.
tape drive Input/output device that controls the movement of magnetic
storage tape past the read/write head while data is accessed or
stored.
task 1. Any major job performed by a computer. 2. One of several
programs being executed by a system.
GLOSSARY
GLOSSARY-25