The first commercial microprocessor was the Intel 4004, introduced by
Intel Corporation more than 30 years ago, in 1971. This 4-bit processor
was followed by 8-bit, 16-bit, 32-bit, and 64-bit processors from Intel
Corporation and other manufacturers. The most successful family of
processors started with the 16-bit Intel® 8086, which set the basis for
the Intel® x86 architecture (also referred to as IA-32).