Xerox 721 Message Manual page 309

GLOSSARY
mixed environment
GLOSSARY-16
memory Space in a device where information is kept, or the ability of a
device to keep information until needed.
menu List of available functions, commands, and options.
merge Operation combining two or more files into one predetermined
order. For example, to merge two separate, alphabetically
ordered files of names would result in one large alphabetically
ordered file.
message Unit of information transmitted by one facility to another in a
form that the receiving facility can understand and act upon. The
standard message format consists of a header (containing
identifying and control information), followed by the actual
message content, followed by a trailer (indicating that the
message is completed).
metacode Same as "native mode." The method of speaking to and
controlling the image generator. These controls are used by the
character dispatcher to generate scan line information. This
information is sent in the form of character specifications to the
image generator, which uses it to compose the bit stream that
modulates the laser.
MHz megahertz. 1. Unit of cycling speed (one million cycles per
second) for an electromagnetic wave (in particular, a radio wave).
2. Sending and receiving stations of a radio wave transmission
must be tuned in to the same unit of megahertz.
MICR Magnetic Ink Character Recognition. MICR allows a computer to
read characters printed in special metallic ink by scanning the
shapes of their magnetic fields. MICR fields are often imprinted
on bank checks before processing.
Multiple Xerox printers or printing systems (for example, 9790
and 4090 printers) in the same location.
mnemonic Possessing qualities helpful to human memory. Software
commands are often rooted in mnemonic terms or abbreviations
to make it easy to associate the functions with the keys pressed
to bring them about.
mode Manner in which an activity or process is carried out.
modem Device that converts digital information into an analog signal
suitable for sending over analog telecommunication lines. Also
converts an analog signal from telecommunication lines into
digital information.
module Cohesive unit within a program. It is consistent in its level and
identifiable in terms of loading or with other units.
XEROX 4635 LASER PRINTING SYSTEM MESSAGE GUIDE