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 front-end processor the Datanet-30 and the GE-235). 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 computers. (1997-09-16)