Operating Systems/Other Softuare
Tim Berners -Lee -reseach
The Four Generations Of Computers
First Generation (1945–1959)
The vacuum tube was invented in 1906 by an electrical engineer named Lee De Forest (1873–1961). During the first half of the twentieth century, it was the fundamental technology that was used to construct radios, televisions, radar, X-ray machines, and a wide variety of other electronic devices. It is also the primary technology associated with the first generation of computing machines.
Second Generation (1960–1964)
As commercial interest in computer technology intensified during the late 1950s and 1960s, the second generation of computer technology was introduced—based not on vacuum tubes but on transistors .
Third Generation (1964–1970)
The third generation of computer technology was based on integrated circuit technology and extended from approximately 1964 to 1970. Jack Kilby (1923–) of Texas Instruments and Robert Noyce (1927–1990) of Fairchild Semiconductor were the first to develop the idea of the integrated circuit in 1959. The integrated circuit is a single device that contains many transistors.
Fourth Generation (1970–?)
The fourth generation of computer technology is based on the microprocessor. Microprocessors employ Large Scale Integration (LSI) and Very Large Scale Integration (VLSI) techniques to pack thousands or millions of transistors on a single chip.