The cathode ray tube (CRT), invented by German physicist Karl Ferdinand Braun in 1897, is the display device that was first used for computer displays, video monitors, televisions, radar displays and oscilloscopes. The CRT developed from Philo Farnsworth's work was used in all television sets until the 1990s and the development of practical plasma screens, LCD TVs, DLP, OLED displays, and other technologies. As a result of CRT technology, television has acquired the moniker "the tube" even when referring to non-CRT sets. A cathode ray tube technically refers to any electronic vacuum tube employing a focused beam of electrons. This article will concentrate on the families of cathode ray tubes used as displays for television, radar, oscilloscopes etc. Another important type of cathode ray tube is the video camera tube. Is it copyright infringement if I just copied and pasted that from Wikipedia? :ohnoes: