  If we admit that quantum mechanics (QM) is universal theory, then QM should
contain also some description of classical mechanical systems. The presented
text contains description of two different ways how the mathematical
description of kinematics and dynamics of classical systems emerges from the
mathematical formalism of QM. The first of these ways is to obtain an
equivalent description of QM (with finite number of degrees of freedom) as a
classical Hamiltonian field theory and afterwards restrict it in dependence of
specific classical system to obtain the classical Hamiltonian mechanics of that
finite system. The second way is transition to QM of systems with infinite
number of degrees of freedom - i.e. of macroscopic systems - and extract from
it classical mechanics (with finite number of degrees of freedom) of
macroscopic variables of this quantum system. The last chapter contains some
considerations concerning the "measurement problem in QM", in which a measured
quantum "microsystem" has to be dynamically connected with changes of classical
states of a macroscopic quantum (sub-)system - the measuring device. Several
models of this process are presented.
