OS/8

From Wacklepedia - The Free Encyclopedia

OS/8 was the primary operating system used on the Digital PDP-8 minicomputer. OS/8 was originally called MS/8 and, for a brief time, PS/8 before Digital settled on the name OS/8 in 1971.

A virtually identical version of OS/8, called OS/12, was later used with Digital's PDP-12 computer.