What is another word for projection tubes?
Pronunciation: [pɹəd͡ʒˈɛkʃən tjˈuːbz] (IPA) 
Projection tubes are devices that are used to emit and focus electron beams for the purpose of projecting images onto a screen. These tubes are also commonly known as cathode ray tubes or CRTs. However, there are several other synonyms for the term projection tubes, including image tubes, picture tubes, electron tubes, and vacuum tubes. These devices have been widely used in the field of electronics for several decades, particularly in television sets and computer monitors. While projection tubes have largely been replaced by newer technologies such as LED and plasma displays, they still remain an important part of technical history and continue to be used in certain applications even today.
