???????, ????, ???????????, ?????, ????? — ???? ??????? ????? ????????? ????????? ??????. ????????? ????????? — ?????????? ? ????? ???????, ???? ?????? ????? ???????? ? ??? ?????????. ???????? ?????????? ?????????? ???????? ????????. The second Berkeley application Distribution (2BSD), produced in could 1979,[12] included up-to-date variations