April 6, 2012 Volume 10, issue 4 PDF CPU DB: Recording Microprocessor History With this open database, you can mine microprocessor trends over the past 40 years. Andrew Danowitz, Kyle Kelley, James Mao, John P. Stevenson, Mark Horowitz, Stanford University In November 1971, Intel introduced the world’s first single-chip microprocessor, the Intel 4004. It had 2,300 transistors, ran at a clock speed