HP 9000

HP 9000 is a line of workstation and server computer systems produced by the Hewlett-Packard Company (HP). The native operating system for almost all HP 9000 systems is HP-UX, which is based on UNIX System V. The HP 9000 brand was introduced in 1984 to encompass several existing technical workstation models previously launched in the early 1980s.

The HP 9000 line was discontinued in 2008, being superseded by the HP Integrity (Itanium) platform running HP-UX, but these are servers only.

The first HP 9000 models comprised the HP 9000 Series 200 and Series 500 ranges. These were rebadged existing models, the Series 200 including various Motorola 68000-based workstations such as the HP 9826 and HP 9836, and the Series 500 using HP's FOCUS microprocessor architecture introduced in the HP 9020 workstation. These were followed by the HP 9000 Series 300 and Series 400 workstations which also used 68k-series microprocessors. From the mid-1980s onwards, HP started to switch over to its own microprocessors based on its proprietary PA-RISC ISA, for the Series 600, 700, 800, and later lines. More recent models use either the PA-RISC or its successor, the HP/Intel IA-64 ISA.

All of the HP 9000 line run various versions of the HP-UX operating system, except earlier Series 200 models, which ran standalone applications or the Basic Workstation / Pascal 3.1 Workstation operating systems. HP released the Series 400, also known as the Apollo 400, after acquiring Apollo Computer in 1989. These models had the ability to run either HP-UX or Apollo's Domain/OS.

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