Images: 35 years of Intel chip design

The 4004 Microprocessor, which debuted 35 years ago, was Intel's first microprocessor. It sparked a technological revolution because it was the first product to fuse the essential elements of a programmable computer into a single chip.

The 4004 was designed to be a calculator component for a Japanese manufacturer, which initially owned all rights to the chip. At the time, most Intel executives saw little promise in the product. Since then, processors have allowed manufacturers to embed intelligence into PCs, elevators, air bags, cameras, cell phones, beepers, key chains and farm equipment, among other devices.