blackboard - Materials. a sheet of slate or other hard material, widely used in classrooms, meeting rooms, and the like for writing with chalk; originally black but now usually light green. Artificial Intelligence. 1. a generally accessible data set or control mechanism.a generally accessible data set or control mechanism. 2. a shared work station.a shared work station. ;
дс тдрлими цюлютдажкию дроемжки аиакиохдйис лидр
http://www.harcourt.com/dictionary/def/1/3/2/3/1323200.html;
