Network

A wide variety of systems of interconnected components are called networks.

http://en.wikipedia.org/wiki/Network

A computer network is a system for communication among two or more computers.

Computer networks may be categorized with respect to range:

- wireless PAN (WPAN) - wireless LAN (WLAN) - metropolitan area network (MAN) - wide area network (WAN) -(Tiny area network (TAN)
 * personal area network (PAN)
 * local area network (LAN)