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MAC (Media Access Control)
1. Used to coordinate the sending of data between computers. The 802.3, 4, 5, and 12 standards apply to this
layer.
2. Hardware address of the network card.
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Mainframe
1. A large, powerful computer, often serving several connected terminals.
2. The central processing unit of a computer exclusive of peripheral and remote devices.
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MAN (Metropolitan Area Network)
MAN is a network connecting computers over a large geographical area, such as a city or school district.
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MAPI (mail application programming interface)
An API that supports email. It was developed by Microsoft, and implemented as a DLL. Applications that recognize
the presence of the MAPI DLL on your system allow you to send mail directly from them.
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MAU (Multistation Access Unit)
MAU is a Token Ring wiring hub.
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MBR (Master Boot Record)
MBR contains the information in the first sector of a hard disk, the data structure that starts the process
of booting the computer. It is the most important area on a hard disk. The Master Boot Record contains the partition
table for the disk, a small amount of executable code and identifies the disk’s active partition (the partition
used to load the operating system). On x86-based computers, the executable code examines the partition table and
identifies the system (or bootable) partition, finds the system partition's starting location on the disk, and
loads an image of its Partition Boot Sector into memory. The Master Boot Record then transfers execution to the
Partition Boot Sector. The master boot record is created during disk partitioning.
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Megabyte = MB
1. A unit of storage capacity equal to 1 048 576 bytes.
2. One million bytes.
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Meta tag
An HTML tag that must appear in the <head> portion of the page. Meta tags supply information about a page
but do not affect its appearance. A standard meta tag, "generator," is used to indicate the type of editor
that created the HTML page.
Meta Tags help your Web Pages get "searched out" and "indexed" by many of the main search
engines. Simply follow the instructions below and fill in the Meta Tags for your Web Site. You do not have to use
Meta Tags on your site, but they help your advertising efforts.
How to use Meta Tags: Type the "Keywords" that describe your business or product, such as; home based
business, earn money, business opportunity, web sites, work from home, money making opportunity. Or, if you sell
a product, such as "fishing accessories" you could use keywords such as; lures, tackle, fishing line,
rods, reels, rods and reels.
Simply use words that describe the product or business that you are promoting on this Web Page that you are creating.
You can use words more than once, but we suggest you don't use them more than 3 or 4 times. Some search engines
will discard pages that use the same words over and over again.
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Microprocessor
Microprocessor is an integrated circuit that contains the entire central processing unit of a computer on a single
chip. Computer processors are made of millions of transistors that charge and discharge electrical currents, thus
creating an on-off state that translates into binary 1s and 0s. Current processors = 0.18-micron
transistors while the new coming processors are 25% thinner or 0.13-micron transistors (smaller distances
between these transistors would permit faster computation speeds).
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MIME type (Multipurpose Internet Mail Extensions type)
A method used by Web browsers to associate files
of a certain type with applications that display files of that type.
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MMJ (Modular Molded Jack)
MMJ is a modular connection used in DEC™ systems
with six wires and a locking tab on the side of the connector.
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MNP® (Microcom Networking Protocol)
MNP is a family of communications protocols from
Microcom, Inc., that are de facto standards for error correction and data compression.
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Modem (MOdulator-DEModulator)
Modem is a device that convert digital and analog
signals. Modems allow computer data (digital) to be transmitted over voice-grade telephone lines (analog). So,
modem is a device that converts data from one form into another, as from one form usable in data processing to
another form usable in telephonic transmission. Modem is a device used to convert serial digital data from a transmitting
terminal to an analog signal for transmission over a telephone channel or to reconvert the transmitted analog signal
into serial digital data for acceptance by a receiving terminal.
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Modem Eliminator
Modem Eliminator is a device used to connect a local
terminal and a computer port instead of the pair of modems they would ordinarily need; enables DTE-to-DTE data
and control signal connections otherwise not easily achieved by standard cables or connectors.
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Motherboard
The main board of a computer, usually containing the circuitry for the central processing unit, keyboard, and monitor
and often having slots for accepting additional circuitry. Motherboard is the "heart" of any PC, it handles
system resources (IRQ lines, DMA channels, I/O locations), as well as core components like the CPU, and all system
memory. It accepts expansion devices such as sound and network cards, and modems.
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Multiplexor (Multiplexer)
Multiplexor (Multiplexer) is a device that allows
multiple logical signals to be transmitted simultaneously across a single physical channel.. So, Multiplexor (Multiplexer)
is a device that divides a transmission into two or more subchannels, either by splitting the frequency band into
narrower bands (frequency division) or by allotting a common channel to several transmitting devices, one at a
time (time division).
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Multipoint Line
Multipoint Line is a single communications line or
circuit that interconnects several stations and usually requires some kind of polling mechanism to address each
connected terminal with a unique address code.
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