Age of people and aging problem

To apply technology to problems of age and aging, we need to better understand these problems and to develop operational technique for their solving. Creation of foundations for such a technique by means of a multifaceted model of age is the main goal of this paper. The suggested approach is based on the system theory of time, multilayer model of evaluation, and on differentiation of three functional subsystems in the human organism: biological, physiological, and psychological.