Centennial anniversary of cryoelectrotechnics

At 10(th) July 1908 year Heike Kammerlingh Onnes in his laboratory in Leiden (Netherland) has firstly in world liquefied helium. This date is treated as the border between classical, especially low temperature science and new era which brought quantum phenomena as superconductivity and superfluidity, construction of new electric devices in the frame of new discipline cryo-electrotechnics. To description this anniversary is devoted this paper.