An e-mail system that includes multiple recipients as part of its address. See e-mail.
Megabyte
Although mega is Greek for a million, a megabyte actually contains 1,048,576 bytes (1,024 x 1,024 bytes). In other words, a million bytes is actually less than a megabyte. Remember that the next time you buy a hard disk or try to fit files onto a floppy disk. Abbreviated as MB.
Mirror site
Because the Internet population has exploded in recent years, a lot of archive servers can't cope with the load. One solution is to create an exact copy of a server--a process called mirroring. Mirror sites divert some of the traffic from the original site. It's not unusual to find a dozen or more mirrors of busy ftp sites.
Modem
A modem is an external box or internal circuitry that converts computer data into sound that can be transmitted over phone lines. First used to send telegrams, early modems alternated between two different tones. This is called modulation, and the process of modulating (and demodulating at the receiving end) gave the modem its name. These days modems transmit data with lots of different tones, signals, and complex mathematical processing, so modem is a bit of a misnomer.
Mozilla
The original name for Netscape's Navigator browser through version 1.1. Netscape "hacker" Jamie Zawinski claims credit for the name, while artist Dave Titus turned Mozilla into Netscape's original mascot. Mo has since been replaced by Netscape's familiar nautical imagery.
MySQL
A true multi-user, multi-threaded SQL (Structured Query Language) database server. SQL is the most popular database language in the world. MySQL is a client/server implementation that consists of a server daemon mysqld and many different client programs/libraries.
