History of Computers

           
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BC 2000 abacus calculation on the basis of the first works in the life of mankind starts with the abacus. It was used for addition and subtraction operations consisting of abacus beads.

MS1642 machine because the name of the inventor Blaise Pascal "Pascaline" was called. It is a mechanical instrument that makes the collection and removal. Developed for tax calculations, but did not always give accurate results.

1670 Gottfried von Leibnitz further developing Pascaline multiplication, division and brought it makes the square root operation. This instrument was working properly.

1842 Charles Babbage resolves complex problems composed of many elements developed a machine.
1890 Hermann Hollerith discovered the hole cards computers. Lovalan cycle used in the study of computer programming with punch cards that island and has developed a sub-program approach.

1946 ENIAC, John Mauchly and Eckert j.presp accepted as the first computer ENIAC 't. The number of transactions in 5000 to 30 tons in weight and seconds.

1951 John Mauchly and Eckert UNIVAC j.presp is a commercial general-purpose computer. For the first time a computer is its ability to store data using magnetic tape.

1958 Seymour Cray fully transistorized computers was made by Seymour Cray. The first transistorized computer was launched by IBM with the 7090 models.

1964 is the first integrated circuit computer, IBM 360 was released. Today is also quite developed integrated circuits are the basic elements of computers. Transistors are increasingly smaller and increasing the number of transistors used in integrated circuits. For example; There are 386 Pentium 4 microprocessor has 42 million transistors 275,000 in the microprocessor.

1965 - 1975 1965 compatible time-sharing operating system which first appeared CTSS.

1975, the first microcomputer Altair output.

In 1981 the first personal computer with IBM- PC output. It is the foundation of today's computers IBM- PC. Although there are many innovations in microprocessor and used parts PCI standard has not changed.