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operating system The first commercial time-sharing system,
created by Dartmouth College and sold by General Electric
around 1967.
GE's Information Service Divsion (ISD) marketed DTSS which was
running on a system called GE-265 (a combination of the
DTSS was ported (and significantly improved by GE ISD around
1965-1966 on a combination of DN-30 and GE-635). This
proprietary system, called Mk-II, later improved by GE and
renamed Mk-III, is still working today (1997) as part of the
GE service bureau that also includes IBM and Unix