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 Glossary - M

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MacWeb
a Macintosh-based graphical-mode Web browser implemented by MCC. (see also MCC)
maintenance
the process of regularly inspecting, testing, and updating the contents of Web pages; also, an attitude that such activities are both inevitable and advisable.
majordomo
a set of Perl programs that automate the operation of multiple mailing lists, including moderated and unmoderated mailing lists, and routine handling of subscribe/unsubscribe operations.
map file
a set of pixel coordinates on a graphic image that correspond to the boundaries of regions that users might select when using the graphic for Web navigation. This file must be created by using a graphics program to determine regions and their boundaries, and then stored on the Web server that provides the coordinate translation and URL selection services.
markup
a way of embedding special characters (metacharacters) within a text file to instruct a computer program how to handle the contents of the file itself.
markup language
a formal set of special characters and related capabilities used to define a specific method for handling the display of files that include markup; HTML is a markup language that is an application of SGML that is used to design and create Web pages.
Mbps (Megabits per second)
a measure of communications speeds, in units of 220 bits per second (220 = 1,048,576 which is just about 1,000,000 and explains the quasi-metric "M" notation).

MCC (Microelectronics and Computing Corporation)
a computing industry consortium based in Austin, Texas, that developed the WinWeb and MacWeb browser programs
metacharacter
a specific character within a text file that signals the need for special handling; in HTML the angle brackets (< >), ampersand (&), pound sign (#), and semi-colon (;) can all function as metacharacters.
MIME (Multipurpose Internet Mail Extensions)
http communications of Web information over the Internet rely on a special variant of MIME formats to convey Web documents and related files between servers and users, and vice-versa.
modem
an acronym for modulator/demodulator, a modem is a piece of hardware that converts between the analog forms for voice and data used in the telephone system and the digital forms for data used in computers. In other words, a modem lets your computer communicate using the telephone system.
Mosaic
a powerful graphical Web browser originally developed at NCSA, now widely licensed and used for a variety of commercial browser implementations.
MPEG or MPG
an acronym for Motion Picture Experts' Group, MPEG is a highly compressed format designed for use in moving pictures or other multi-frame-per-second media (like video). MPEG can not only provide tremendous compression (up to 200 to 1), it also update only elements that have changed on-screen from one frame to the next, making it extraordinarily efficient as well. .MPEG is the common file extension to denote files using this format, and .MPG is the three-letter equivalent in use on DOS and Windows systems (which can't handle four-letter file extensions).
MPPP (Multilink Point-to-Point Protocol)
an Internet protocol that allows simultaneous use of multiple physical connections between one computer and another, to aggregate their combined bandwidth and create a "larger" virtual link between the two machines.
multimedia
a method of combining text, sound, graphics, and full-motion or animated video within a single compound computer document.
MVS (Multiple Virtual Storage)
a file system used on IBM mainframes and clones.

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Revised -- May, 2002 [MCB]