Television (often abbreviated to TV) is a widely used telecommunication
system for broadcasting and receiving moving pictures and sound over a distance.
The term may also be used to refer specifically to a television set, programming
or television transmission. The word is derived from mixed Latin and Greek roots,
meaning "far sight": Greek tele, far, and Latin vision, sight
(from video, vis- to see, or to view in the first person).
Since it first became commercially available from the late 1930s, the television set
has become a common household communications device in homes and institutions,
particularly in the First World, as a source of entertainment and news. Since the 1970s,
video recordings on VCR tapes and later, digital playback systems such as DVDs,
have enabled the television to be used to view recorded movies and other programs.
A television system may be made up of multiple components, so a screen which lacks an
internal tuner to receive the broadcast signals is called a monitor rather than a television.
A television may be built to receive different broadcast or video formats, such as
high-definition television, commonly referred to as
HDTV.
HDTV costs more than normal TV but is becoming more available.
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