section_path: Innovations/Computers
section_name: Computers
paragraph_text: Computers
  
  Before the advent of electronics, mechanical computers, like the Analytical Engine in 1837, were designed to provide routine mathematical calculation and simple decision-making capabilities. Military needs during World War II drove development of the first electronic computers, based on vacuum tubes, including the Z3, the Atanasoff–Berry Computer, Colossus computer, and ENIAC.
  
  The invention of the transistor enabled the era of mainframe computers (1950s–1970s), typified by the IBM 360. These large, room-sized computers provided data calculation and manipulation that was much faster than humanly possible, but were expensive to buy and maintain, so were initially limited to a few scientific institutions, large corporations, and government agencies.
  
  The germanium integrated circuit (IC) was invented by Jack Kilby at Texas Instruments in 1958. The silicon integrated circuit was then invented in 1959 by Robert Noyce at Fairchild Semiconductor, using the planar process developed by Jean Hoerni, who was in turn building on Mohamed Atalla 's silicon surface passivation method developed at Bell Labs in 1957. Following the invention of the MOS transistor by Mohamed Atalla and Dawon Kahng at Bell Labs in 1959, the MOS integrated circuit was developed by Fred Heiman and Steven Hofstein at RCA in 1962. The silicon-gate MOS IC was later developed by Federico Faggin at Fairchild Semiconductor in 1968. With the advent of the MOS transistor and the MOS IC, transistor technology rapidly improved, and the ratio of computing power to size increased dramatically, giving direct access to computers to ever smaller groups of people.
  
  The first commercial single-chip microprocessor launched in 1971, the Intel 4004, which was developed by Federico Faggin using his silicon-gate MOS IC technology, along with Marcian Hoff, Masatoshi Shima and Stan Mazor.
  
  Along with electronic arcade machines and home video game consoles pioneered by Nolan Bushnell in the 1970s, the development of personal computers like the Commodore PET and Apple II (both in 1977) gave individuals access to the computer. However, data sharing between individual computers was either non-existent or largely manual, at first using punched cards and magnetic tape, and later floppy disks.