The abacus, which was invented about 5000 years ago in Asia and is still in use today, may be considered the first computer. This device helps users to calculate using a system of sliding beads on a rack. But as the use of pencil and paper has got more common, the abacus lost its importance. It took nearly 12 centuries for the next remarkable advance in computing to appear. In 1642, Blaise Pascal (1623-1662), the 18-year-old son of a French tax collector, invented a numeri

During the fourth generation (1971-Present) PCs (Personal Computers) came into the world. In 1980, IBM introduced its personal computer for use in home, office and schools. The number of PCs in use doubled form 2 million in 1981 to 5.5 million in 1982. Ten years later, 65 million PCs were being used. The number continues increasing. Finally the fifth generation includes the present and the future of computers which is difficult to predict. But one thing is for sure, nowadays computers can do tricks that you haven’t dreamt of even in your wildest dreams.

Another computer development was the Electronic Numerical Integrator and Computer (ENIAC), produced by the U.S. government and the University of Pennsylvania. It was developed by John Presper Eckert (1919-1995) and John W. Mauchly (1907-1980) and consisted 18, 000 vacuum tubes, 70,000 resistors 5 million soldered joints and consumed 160 kilowatts of electrical power (the same energy to light up the entire Philadelphia. But unlike the Colossus and Mark I, ENIAC was a general-purpose computer that was 1000 times faster than Mark I.

The modern computer had gone through 5 different stages, we call it the five generation of the modern computer.

Some topics in this essay:
, Konrad Zuse, Personal Computers, Blaise Pascal, Mark ENIAC, John Mauchly, World War, Machines IBM, Herman Hollerith, Howard Aiken, general-purpose computer, generation modern, modern computer, world war, add sums, computer called,