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World’s First Microprocessor. Tedd Hoff was the first person to innovate that a single-chip CPU is possible by using new silicon-gated technology during the late 1960’s.
Hoff and the Intel team developed such an architecture with just over 2,300 transistors in an area of only 3x4 mm. With its 4-bit CPU, command register, decoder, decoding control, control monitoring of machine commands and interim register, the 4004 was one heck of a little invention.
Today's 64-bit microprocessors are still based on similar designs, and the microprocessor is still the most complex mass-produced product ever with more than 5.5 million transistors performing hundreds of millions of calculations each second - numbers that are sure to be outdated fast.
(http://inventors.about.com/od/mstartinventions/a/microprocessor.htm)
SPECIFIACTIONS:
Max CPU clock rate: 740 Khz
Min Feature size: 10μm
Instruction Set: 4-bit BCD oriented
Application: Busicom Calculator,
Arithmetic Manipulation
Package(s): 16-pin DIP
(http://inventors.about.com/od/mstartinventions/a/microprocessor.htm)