HP 9000 and PA-RISC computers story

The HP 9000 Series of computers spanned almost three decades and very diverse platforms of Unix computers. Both RISC and Unix, with a longer history, were developed into coherent products during the 1980s, moving from academia via industrial R&D to productization at a time when much computing was still done on mainframes, minicomputers and time-sharing machines such as DEC PDP, VAX, IBM AS/400 and System/360.Paul Weissmann tells the story of the development and history of the HP9000.