1. Short for Metropolitan-Area Network, MAN is a network that is utilized across multiple buildings. A MAN is much larger than the standard Local-Area Network (LAN) but is not as large as a Wide Area Network (WAN) and commonly is used in school campuses and large companies with multiple buildings.
2. Short for Manual, man is a Unix and Linux command to display the manual of a command. For example, at the Linux prompt typing "man ls" would display the manual for the ls command.