Did You Know? The first microprocessor created by Intel was the 4004. It was designed for a calculator, and in that time nobody imagined where it would lead.
Intel announced its 4004 processor and its chipset through an ad in Electronic News on November 15, 1971, making them the first complete CPU on one chip and the first commercially available microprocessor. The building-block 4004 CPU held 2300 transistors.