• Intel 4004: The first microprocessor, introduced in 1970
    • Intel 8080: The first widely used microprocessor, introduced in 1974
    • CPU's four operational steps: fetch, execute, decode, and writeback
    • Moore's Law: Transitor counts in CPUs doubles every 2 years
    • Intel 486: Microprocessor reached 1 million transistors in 1989
    • Core 2 Duo: Microprocessor reached 253 million transistors in 2006
  • Central Processing Unit

    The CPU, or central processing unit, or more simply "processor" is a chip that executes software instructions. It is the workhorse of the computer system and is found in desktop & laptop computers, cell phones, calculators, automobiles, and many other modern-day items. CPU speeds are expressed in Hertz and chips may contain one or multiple cores.
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