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From DEC's PDP-1 (1960) through the RISC workstation wars of the 1990s. Minicomputers democratized computing at the departmental level — one computer per lab instead of one per institution. Unix was born on a PDP-7, rewritten on a PDP-11, and spread to the world on VAXes and Sun workstations. The entire scientific computing culture of 1970–2000 ran on these machines. Dashed markers show company acquisitions. Hover any node for details.