The Intel 8051 is a microcontroller developed by Intel in 1980 for use in embedded products and still (2003) one of the most popular microcontrollers.

The 8051/8031 cores are used in over 100 devices from 10 independent manufacturers such as Dallas, Philips and Atmel.

See also:

This article (or an earlier version of it) contains material from FOLDOC, used with permission.