This issue of the journal contains reports submitted for participation in the International Congress "MODERN PROBLEMS OF COMPUTER AND INFORMATION SCIENCES", held at Lomonosov Moscow State University on November 25-27, 2021. The Congress is held as part of the program of the Federal Educational and Methodological Association in the field of higher education under the Enlarged Group of Specialties and Areas of Training 02.00.00 Computer and Information Sciences. The Congress is part of a programme of activities of the Moscow Center of Fundamental and Applied Mathematics.