01007nam--2200349---450-9900003634602033160036346USA010036346(ALEPH)000036346USA01003634620010316d1973----km-y0itay0103----baengUS||||||||001yyOperatin systema pragmatic approachHarry Jr. KatzanNew YorkVan Nostrand Reinhold Co.1973387 p.ill.23 cmComputer science approach2001Computer science approach001-------2001001.642KATZAN,Harry Jr.111195ITsalbcISBD990000363460203316001.642 KAT6875001.64200105705BKSCIPATTY9020010316USA01133820020403USA011644PATRY9020040406USA011625Operatin system877083UNISA