This document contains information about various microprocessors: - The 4004, introduced in 1971, was the first commercial microprocessor made by Intel for use in calculators. The improved 4040 was also introduced for this purpose. - The 8008 with 8-bits was released in 1972 and was used in the Altair 8800 microcomputer and other applications. The enhanced 8080 followed in 1974. - The 8-bit 8085 was introduced in 1976 and was commonly used to control computer peripherals. - The 16-bit 8086 launched in 1978 was utilized in early IBM PC computers and their compatible models. It had greater processing power and memory capacity than previous chips.