Megabyte
A million bytes or 1024 kilobytes.
MIME
(Multipurpose Internet Mail Extensions) The standard for attaching non-text files to standard Internet mail messages. Non-text files include graphics, spreadsheets, formatted word-processor documents, sound files, etc. An email program is said to be MIME Compliant if it can both send and receive files using the MIME standard. When non-text files are sent using the MIME standard they are converted (encoded) into text - although the resulting text is not really readable. Generally speaking the MIME standard is a way of specifying both the type of file being sent (e.g. a Quicktime video file), and the method that should be used to turn it back into its original form. Besides email software, the MIME standard is also universally used by Web Servers to identify the files they are sending to Web Clients , in this way new file formats can be accommodated simply by updating the Browsers list of pairs of MIME-Types and appropriate software for handling each type.
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 exact copies of material originated at another location, usually in order to provide more widespread access to the resource. Another common use of the term mirror refers to an arrangement where information is written to more than one hard disk simultaneously, so that if one disk fails, the computer keeps on working without losing anything.
