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Glossary
Installation Planning Guide 5
bitmapped Display image generated bit by bit for each point or dot. A
software-driven scanner is used to create characters and/or
graphics.
bits per second
(bps)
In serial communication, the instantaneous bit speed with which
a device or channel transmits a character.
blocking Process of combining two or more records into a single block of
data which can then be moved, operated upon, stored, etc., as a
single unit by the computer.
block length Number of characters or bytes contained in a block of data (the
block is treated as a unit within the computer). Block length is
usually invariable within a system and may be specified in units
such as records, words, computer words, or characters.
boot To load a program’s initial instructions of a program into the
computer’s memory. These instructions then direct the loading of
the rest of the program. Booting may require entry of a few
commands at the keyboard or the flip of a switch to begin the
process.
break page
See
header page.
buffer Compartment of memory in which data is stored during transfer
from one device to another. Useful for (1) accumulating data into
blocks before storage or processing, and (2) for adjusting
differences of speed between devices, or between a device and
a communicating facility.
bypass transport Optional module that moves paper from the printer to a finishing
device.
byte Fixed number of bits (in data processing, usually 8) operated
upon as a unit. A byte may represent a character, a machine
instruction, or some other logical unit of information.
CCU Customer changeable unit. In the 4850, 4890, and 92C, the unit
removed to change the color of the dry ink installed in the printer.
Consists of the color developer housing and the dry ink bottle.
CCU changeout
cart
Cart used to remove and install the customer changeable unit for
changing the color dry ink installed in the printer.
carriage return Control character that (unless set to be interpreted as a line end)
causes the printing system to start printing at the left margin of
the current line.
case–sensitive Treating lowercase and uppercase characters differently.
channel 1. In data communications, a path or line that enables two or
more devices to communicate (sometimes called a circuit,
facility, or link).