An apparatus for transmitting and receiving television pictures in which a video signal is generated by the action of light on photoconductive cells after having passed through a revolving perforated disk, this signal controlling the brightness of a neon lamp which, in conjunction with a second disk, projects an image; (originally and especially) a device of this kind designed and patented by John Logie Baird.

A person who works in the television industry, e.g. as a presenter.

An organization that makes or broadcasts television programmes.