???? ?????? ??? ??? ?? ??????? ????? ??? ??????? ??? ?????? ??????? ????? ?????????? ???????????? ?????????? ?????? ????????? ??????? ?????? - ???? ??????????? - ????? ????????????? ???????????? ???????????? ???????? ????????????? ?????? ??????? ????? ?? ????????? ?????? ??????? ??????? ? ??? ?????? ????? ?? ???? ?????? In 1975, the main digital