Maillist
(or Mailing List) A (usually automated) system that allows people to send e-mail to one address, whereupon their message is copied and sent to all of the other subscribers to the maillist. In this way, people who have many different kinds of
e-mail access can participate in discussions together.
See also: Email, Listserv ®

M-commerce
Transactions through mobile phones.

Megabyte
A million bytes. Actually, technically, 1024 kilobytes.
See also: Byte, Kilobyte

Metatags
Metatags are words in the HTML code of a web site, which search engines look at when compiling their list of sites relevant to
someone’s search. Metatags should be words that are directly
relevant to your site.

MIME -- (Multipurpose Internet Mail Extensions)
Originally a standard for defining the types of files attached to standard Internet mail messages. The MIME standard has come to be used in many situations where one computer program needs to communicate with another program about what kind of file is being sent.
For example, HTML files have a MIME-type of text/html, JPEG files are image/jpeg, etc.

Mirror
Generally speaking, "to mirror" is to maintain an exact copy of something. Probably the most common use of the term on the Internet refers to "mirror sites" which are web sites, or FTP sites that maintain copies of material originated at another location, usually in order to provide more widespread access to the resource. For example, one site might create a library of software, and 5 other sites might maintain mirrors of that library.

Modem -- (MOdulator, DEModulator)
A device that connects a computer to a phone line. A telephone for a computer. A modem allows a computer to talk to other computers through the phone system. Basically, modems do for computers what a telephone does for humans.

MOO -- (Mud, Object Oriented)
One of several kinds of multi-user role-playing environments.

Mosaic
The first WWW browser that was available for the Macintosh, Windows, and UNIX all with the same interface. Mosaic really started the popularity of the Web. The source-code to Mosaic was licensed by several companies and used to create many other web browsers.
Mosaic was developed at the National Centre for Supercomputing Applications (NCSA), at the Univeristy of Urbana-Champange in Illinois, USA. The first version was released in late 1993.

MS SQL Database Facilities:
If your client requires an industrial strength database for their web site, or online application, then the number one choice for Windows servers is MS SQL. This powerful SQL database can support all your requirements, no matter how demanding. This is purchased on a yearly license basis per domain.

MUD -- (Multi-User Dungeon or Dimension)
A (usually text-based) multi-user simulation environment. Some are purely for fun and flirting, others are used for serious software development, or education purposes and all that lies in between. A significant feature of most MUDs is that users can create things that stay after they leave, and which other users can interact with in their absence, thus allowing a world to be built gradually and collectively.

MUSE -- (Multi-User Simulated Environment)
One kind of MUD - usually with little or no violence.