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The authors consider the history of Computer Algebra (CA) development and applications at the famous Keldysh Institute of Applied Mathematics (Russia Academy of Science). At the Institute CA was used in various areas: Applied Celestial Mechanics, Mathematics, Robotics, Hydromechanics, and Methods of Calculation. Authors compared and classified the existing systems and their possibilities. An attention is paid to REFAL (REcursive Functions Algorithmic Language), developed in the Institute. The modern state of investigations is also concerned. The list of the main references is presented.

The article highlights the problems of exploitation of cultural heritage objects, which characterizes the subject area of the study. The classification of objects of cultural heritage and features of their definition in different countries are presented. The analysis of statistical data on cultural heritage sites in the Russian Federation, including those included in UNESCO, was carried out. The features of management, as well as the problems of monitoring the state of cultural heritage objects are considered. A separate and fundamental issue of management of cultural heritage sites is security activities, which are based on unique models formed by different countries based on their experience. A mechanism for managing cultural heritage objects in a digital environment and a universal conceptual model for introducing digital technologies into the system of real estate operation are proposed.