Fast development of technologies is an integral part of modern life. Innovations touch every field of human activity. Distances become shorter and time runs faster.  

Today progress has almost absorbed the ancient traditions of mailing and, in return, we are offered a way of electronic communication. Thoughts are no longer expressed on paper, no one is sending the envelops with warm letters to the most beloved, no more kind wishes travel in the mail bags, and no one is waiting for the envelop in return. Pragmatic component of modernity has erased magical essence of the correspondence, but return addresses remain.