FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -The first generation computers used vacuum tubes for circuitry and magnetic drums for memory, and were often enormous, taking up entire rooms. The vacuum tube was developed by Lee De Forest. A vacuum tube is a device generally used to amplify a signal by controlling the movement of electrons in an evacuated space.

Detailed explanation-2: -The most widely used mechanism in vacuum tubes is thermionic emission, or electron emission by application of heat. The amount of energy needed to release electrons from a given material is known as its electronic work function.

Detailed explanation-3: -The computers of first generation used vacuum tubes as the basic components for memory and circuitry for CPU (Central Processing Unit). These tubes, like electric bulbs, produced a lot of heat and the installations used to fuse frequently.

Detailed explanation-4: -An electronic device that controls the flow of electrons in a vacuum. It is used as a switch, amplifier or display screen (CRT). Used as on/off switches, vacuum tubes allowed the first computers to perform digital computations.