(1) (
Lower 
Case)  See 
case sensitive.
(2) (
Lucent 
Connector)  See 
LC connector.
(3) (
Liquid 
Crystal)  See 
LCD.
(4) (
Low-cost 
Color)  See 
Mac models - early.
(5) (
Liquid 
Coupled)  A method for attaching the lens to the CRT in a CRT-based movie projector.  A liquid chamber is placed between lens and CRT, and the liquid reduces the halo effect caused by reflections bouncing back from the lens into the tube face.  See 
front-projection TV.