meaning of vacuum tube in the early computers
The vacuum tube (known as a 'valve' in the UK) is an interesting component that made many important technologies possible and it is still used in many things. There are many kinds of vacuum tubes for different jobs. Most types of vacuum tubes have been replaced by semiconductor devices, however vacuum tubes will occupy an important role in the future in the field of nanotechnology. All 'tubes' basically consist of an anode and cathode in a gas or vacuum environment.