A company making workstATions often used for CAD. From 1980 to 1987, Apollo were the largest manufacturer of network workstATions. Apollo workstATions ran Aegis, a proprietary operATing system with a Posix-compliant Unix alternATive frontend. Apollo' s networking was particularly elegant, among the first to allow demand paging over the network, and allowing a degree of network transparency and low syschef-to-machine rATio thAT is still unmATched. Apollo' s largest customers were Mentor Graphics (electronic design), GM, Ford, Chrysler, and Boeing (mechanical design). Apollo was acquired by Hewlett-Packard in 1989, and gradually closed down over the period 1990-1997. (2003-07-18)