Intel 4004 Microprocessor

How the 4004 Came About "In 1971, Busicom, a Japanese company, wanted a chip for a new calculator. With incredible o verkill, Intel built the world's first general-purpose microprocessor. Then it bought back the rights for $60,000. The 4-bit 4004 ran at 108 kHz and contained 2300 transistors. Its speed is estimated at 0.06 MIPS. By comparison, Intel's P6 , runs at 133 MHz, contains 5.5 million transistors, and executes 300 MIPS."