The next innovation was the use of punch cards to give the machine directions and to input data. Herman Hollerith first successfully used this in computers in 1890 to sort out the US Census taken that year. The punch card system is still used in some computers today.

The first electronic computers appeared in the 1940's. Their electronic switching circuits were based on vacuum tubes that turned on and off using the binary system. During World War II there was a need to quic

The problems with the First Generation machines were that the vacuum tubes kept burning out. The vacuum tubes were replaced during the next generation (1959-1963) of computers by transistors. Transistors were much more reliable than the vacuum tubes and were much smaller. They ran cool and used much less power to run. The memory of these computers was composed of small magnetic cores strung on wire within the computer and magnetic disks were used for secondary storage. These computers could use telephone lines to communicate with each other.

We are now into the Fourth Generation of computers. The invention of the microprocessor, a single chip with the entire control unit and arithmetic-logic unit on it, made the computer even smaller and more assessable to people. Computers became even more user friendly. The major computer companies have been the Apple an

Some common words found in the essay are:
Integrator Calculator, History Computers, Third Generation, Fifth Generation, Herman Hollerith, Fourth Generation, Apple IBM, War II, vacuum tubes, generation computers, secondary storage, using binary system, input data, single chip, binary system, punch cards, using binary,
Approximate Word count = 587
Approximate Pages = 2 (250 words per page double spaced)