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Pyramid Technology Corporation was a computer company that produced a number of RISC-based minicomputers at the upper end of the performance range.[1] It was based in the San Francisco Bay Area of California
They also became the second company to ship a multiprocessor UNIX system (branded DC/OSx), in 1985, which formed the basis of their product line into the early 1990s. Pyramid's OSx was a dual-universe UNIX which supported programs and system calls from both 4.xBSD and AT&T's UNIX System V.[2]