The event brings together developers who use Oberon-family systems in their practice, and interested listeners. Every year, experts representing fundamental science (high energy physics, biophysics), strategic industries (Rosatom), the industry of control systems (APCS, unmanned aerial vehicles), small innovative business (development of software systems for various purposes) make reports. Also in the center of attention are the problems of IT education, from grade 5 to specialized higher, and the key to their solution, developed by the Informatics-21 project. The mission of the seminar, besides the exchange of experience between the participants, is the broadcast of IT education in the industry and in the field of education.