TY CONF TI NUMBER SYSTEMS KW digit KW number KW symbol KW number system JO MODELING INFORMATION SYSTEMS AND TECHNOLOGIES – 2025 AU Osipov, M.A. AU Tarasova, N.A. AU Grigoriev, A.V. PY 2025 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov