Although he was able to perform 5,000 additions and 360 multiplications per second, its programming was tedious.
was the ENIAC, built in the middle of 1940. Was used for scientific purposes, such as climate prediction, atomic energy calculations and cosmic ray studies. We used hundreds of vacuum tubes to store information and programming instructions.
a century ago John Ambrose Fleming invented the vacuum tube, the "lamp" that was operated radios and televisions (and computers) for decades.
When in 1948 is invented the transistor , is replaced the hundreds of vacuum tubes, resulting in a faster processing speed and lower cost of manufacture.
A end of 1950 be created the integrated circuits (electronic circuits miniature on small pickups of silicon) and were replaced hundreds of transistors. Microchips increased even more the speed, reliability and density of computers.
Most chips are small chunks or chips of silicon, 2 to 4 mm2, on which transistors are fabricated. Photolithography allows the designer to create hundreds of thousands of transistors on a single chip properly placing the number of regions n-type p. During manufacturing, these regions are interconnected through tiny wires, to produce complex specialized circuits.
The invention the first microprocessor to beginning of 1970, led to a new generation of computers. Microcomputers (known as computers personal ) occurred in 1975.
1971: Intel 4004. Note: It was the first commercial microprocessor. Was released on November 15, 1971.
In 1977, Apple introduced your Apple computer II U.S. $ 1.300. In the course of the three years, half people had a personal computer had a Apple system.
In 1981 IBM introduced its PC, with a retail price of approximately U.S. $ 3.000. A full team to color cost $ 6.000. The language of BASIC programming is distributed with computers that were sold at that time.
