SunOS and VMS were two of the most common workstation/minicomputer-class OSes out there, and rather less exotic than IRIX. I'm old enough that my college-fresh

SunOS and VMS were two of the most common workstation/minicomputer-class OSes out there, and rather less exotic than IRIX. I'm old enough that my college-freshman "intro to computers" and Fortran classes were taught on a CDC Cyber running NOS.