FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -In fact, the ENIAC used 18, 000 vacuum tubes in order to function, allowing signals to be sent and calculations to be performed more quickly through the use of electrical switching rather than the slower mechanical switching.

Detailed explanation-2: -The machine contained 19, 000 vacuum tubes, 1500 relays, and several hundred thousand resistors, capacitors, and conductors. There were 20 accumulators, each capable of storing a 10 digit number. The ENIAC could perform about 5000 additions or 50 multiplications in one second. The clock speed was 100kHz.

Detailed explanation-3: -Each of the ENIAC’s vacuum tubes was about the size of one of today’s household light bulbs. Here, however, the vacuum tube was used not as an amplifier but rather as a switch in an electrical circuit-that is, as a device that could switch between two states: on and off.

Detailed explanation-4: -The first generation of computers used vacuum tubes; the second generation of computers used transistors; the third generation of computers used integrated circuits; and the fourth generation of computers used microprocessors.

Detailed explanation-5: -Used as on/off switches, vacuum tubes allowed the first computers to perform digital computations. Although tubes made a comeback in high-end stereo components, they have long since been abandoned for TVs and computer monitors.