RISC/os is a discontinued UNIX operating system developed by MIPS Computer Systems, Inc. from 1985 to 1992, for their computer workstations and servers
early 1990s, such as ARM, PA-RISC, and Alpha, created central processing units that increased the commercial utility of the Unix workstation and of embedded
Packard Unix") is Hewlett Packard Enterprise's proprietary implementation of the Unix operating system, based on UnixSystem V (initially System III) and