Xerox 721 Message Manual page 308

GLOSSARY
low-level language Language that is close to machine language so that each written
instruction in a program can be converted to machine language
on a one-to-one basis.
LUN logical unit number. A number which identifies a peripheral
device to the OSS.
machine language Binary code that can be read directly by a computer's central
processing unit (CPU). All programming languages are eventually
broken down into machine language for execution by the
computer. See also computer language.
magnetic media Term for all storage devices, such as disks, diskettes, and tape,
on which data is stored in the form of magnetized spots on
surface of the media.
magnetic storage Use of magnetic media to store data, programs, and so on.
magnetic tape Flexible plastic tape, with one side offering a magnetic surface
suitable for storing computer data in the form of magnetized
spots. Magnetic tape is often used for long-term storage since it
can accommodate large volumes of information.
mainframe Central processing unit (CPU) and memory of a large computer.
More often used to denote any large computer of the type that
might be used to control a group of smaller computers,
terminals, or other devices. See also host.
map To establish a set of values having a defined correspondence
with the quantities or values of another set.
margins White space on each side of printed text.
mask 1. Selection of bits from a storage unit by using an instruction
that eliminates the other bits in the unit. 2. In accessing files, a
file name mask is used to reference one or more files with similar
file-id (identifier) syntax. 3. In Interpress, a mask serves as a
template, indicating the shape and position of an object on a
page.
master file File serving as a general reference point for a particular
application system. Provides information to be used by the
program. It is usually updated and maintained to reflect the
results of current or daily processing operations.
MB megabyte. Unit of one million bytes.
media Vehicles or devices by which information is stored or transmitted.
Classifications include source, input, and output.
medium Object or material on which data is stored, for example,
magnetic tape or floppy disk.
XEROX 4635 LASER PRINTING SYSTEM MESSAGE GUIDE GLOSSARY-15