The Development of Interactive Systems of Programming at Nizhny Novgorod University

Described in the article are the multiaccess systems on the basis of the algorithmic language BASIC, developed in the N.I. Lobachevski\´s Nizhny Novgorod state university in the period of 1969-1978. The first of them was the BASIC- batch-processing system that was introduced on an M-20 type ECM (BESM-3, BESM-4, M-220, M-222) in early 1970. It was actively used in academic processes and, unlike other computers of the time, had an incremental compiler. This option, in 1971, has allowed changing the batch-processing system into a multiaceess conversational system entitled "Student". The system was installed free of charge in more than a hundred design organizations and educational institutions of the country. In 1976 the last version of the time sharing operation system appeared that provided an opportunity to conversationally program on a Unified Series ECM under a Unified Series DOS.