A television is a device that electronically transmits visual and sound signals to a screen for the purpose of entertainment, education or information. Television sets were first commercially available in 1928. The first televisions were black-and-white, but color television sets were introduced in the 1960s. Televisions are a common part of the American household.

The most common type of television is the CRT, or cathode ray tube. CRT televisions are large, bulky and heavy. They are slowly being phased out in favor of flat-screen televisions. Flat-screen televisions are available in two varieties: plasma and LCD. Plasma televisions are made up …