  In this article we give the basic concept of the "Topological Numbers" in
theory of quasiperiodic functions. The main attention is paid to apperance of
such values in transport phenomena including Galvanomagnetic phenomena in
normal metals (Chapter 1) and the modulations of 2D electron gas (Chapter 2).
We give just the main introduction to both of these areas and explain in a
simple way the appearance of the "integral characteristics" in both of these
problems. The paper can not be considered as the detailed survey article in the
area but explains the main basic features of the corresponding phenomena.
