HP 3000

The HP 3000 series is a family of 16-bit and 32-bit minicomputers from Hewlett-Packard. It was designed to be the first minicomputer with full support for time-sharing in the hardware and the operating system, features that had mostly been limited to mainframes, or retrofitted to existing systems like Digital's PDP-11, on which RSTS/E, IAS, and Unix were implemented. First introduced in 1972, the last models reached end-of-life in 2010, making it among the longest-lived machines of its generation.