Intel 486 microprocessor, 1989.

UNITED STATES – JUNE 20: The Intel 486 microprocessor was introduced in 1989 and marked a significant improvement in the processing capacity of computers over that of the previous Intel 386 (introduced in 1985). In addition, the 486 processor was the first to offer a built-in �math co-processor�. This increased computing speeds because complex mathematical functions could be processed away from the central processor. (Photo by SSPL/Getty Images)