Unix
 
A multitasking, multiuser computer operating system developed by AT&T. Several versions exist, e.g., the Berkeley version.
 

UTP
 
Unshielded twisted pair, one or more cable pairs surrounded by insulation. UTP is commonly used as telephone wire.
 

Wide Area Network (WAN)
 
A network using common carrier transmission services for transmission of data over a large geographical area.

Workgroup Switching
 
Configuration in which a number of users are connected to an Ethernet network via a switch. Switching allows each user to get greater throughput than would be available through a hub.