Primos
From OS-Tan Collections Wiki
Developed in the 70s, and peeking at popularity in the mid 80s, PR1MOS was minicomputer OS. PR1MOS shows a strong Multics influence; several former Multicians worked at Prime Computer, and the founder of Prime referred to PR1MOS as Multics-in-a-shoebox. While a contender as a mainline minicomputer operating system, PR1MOS lost favor to PCs in the early 90s.
PR1MOS-tan is shown as a somewhat mature woman, with short dark hair and green eyes.
See also: