???????, ????, ???????????, ?????, ????? — ???? ??????? ????? ????????? ????????? ??????. ????????? ????????? — ?????????? ? ????? ???????, ???? ?????? ????? ???????? ? ??? ?????????. ???????? ?????????? ?????????? ???????? ????????. The second Berkeley program Distribution (2BSD), produced in may perhaps 1979,[twelve] incorporated up to date