GMOS
Technical Details
General Motors Operating System (aka GM-NAA I/O) is the first OS made, by General Motors Research in 1955 for IBM's first commercial computer, the IBM 701.
Character Details
The enigmatic matriarch of all later IBM-tans. Her predecessors were ASCC (aka Harvard Mark I) and SSEC (Selective Sequence Electronic Calculator). She differed radically from them for being an OS, and as such can be installed on multiple sites, while her predecessors were single-installation computers with a much more limited scope of influence and life force. She never knew them though, because they died before she was created.
GMOS-tan is depicted as a woman with curly hair, a frilly gown with a punch-card theme, a collar and tie which reference the industrial use of this OS. She was accompanied by assembly worker servants, and was a queen-like figure to her subjects.
She died long ago, much of what was known of her personality and appearance had been lost to time, but is still revered by the IBM-tans, and the many mainframe-tans she influenced.
Her immediate family was her three daughters: IBSYS-tan, UMES-tan and BESYS-tan.