semaphore - The classic method for restricting access to shared resources (e.g. storage) in a multi-processing environment. They were invented by Dijkstra and first used in T.H.E operating system;
дс тдрлими цюлютдажкию дроемжки аиакиохдйис лидр
http://foldoc.doc.ic.ac.uk/foldoc/foldoc.cgi;