LAN

Local Area Network. A network that is confined to a limited geographic area. This can be a room, a floor, a building, or even an entire campus. See also: Network, MAN, and WAN.

Laptop Computer

A self-contained portable computer small enough to use on a person’s lap. 

Laser

Light Amplification by Stimulated Emission of Radiation. A device that generates electromagnetic radiation in the form of visible, infrared, or ultraviolet light. 

LED 

Light Emitting Diode. A semiconductor device that emits visible light when an electric current passes through it. See also: Semiconductor.

Logical Topology 

The path that signals take from one computer to another which can correspond to the physical topology. See also: Physical Topology and Topology.

LPT

Line Printer Terminal. The designation of any printer as seen by an operating system. See also: Operating System.