Xerox 721 Message Manual page 314

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XEROX 4635 LASER PRINTING SYSTEM MESSAGE GUIDE
protocol Formal set of conventions governing the format of data and the
control of information exchange between two communication
devices.
PSC printer subsystem controller. Command and task that download
any of the following to the appropriate board:
SCSI controller software
RIP software
CSI software
purge To delete data from a system.
query Request for data or other information, entered by an operator
while the system is processing.
queue List of documents waiting to be processed.
RAM random access memory. Storage that allows data, such as
documents, to be stored and retrieved directly by address
location without reading through any other data.
raster data Binary data, usually consisting of dots arranged in scan lines,
according to the print order.
rasterization Creation of a page's bit map image for printing.
read/write head Input/output device that reads and writes data in the form of
magnetic dots on the surface of an external storage medium,
such as a magnetic disk.
real time To process transactions as they are entered into a system. User
and system interchange allow transactions to be processed and
the results returned to the user.
record Collection of data or words treated as a unit.
recovery Act of overcoming a problem or error during processing.
Typically, a specialized software recovery routine gains control
and attempts to resolve the error without crashing the system.
remote access Access to a central computer by terminals or devices
geographically separated from that computer.
character Character whose bit map is a combination of other bit maps that
have been positioned relative to each other, such as accented
characters and single characters consisting of two or more
characters. A rendered character does not require additional disk
space or font memory.
repagination In word processing, a function allowing pages to be readjusted
as text is added or deleted from a document. Page length can
be altered or preserved as required.
GLOSSARY
GLOSSARY-21