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GLOSSARY
GLOSSARY-12 XEROX 4635 LASER PRINTING SYSTEM INSTALLATION PLANNING GUIDE
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.
margins White space on each side of printed text.
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.
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).