00317nam a2200133Ia 4500008004100000020001500041041001200056082001100068100001300079245004300092260003300135300000800168650000700176221030s9999    xx            000 0 und d  a8187325119  aEnglish  a105.23  aE. Walia 0aOperating System Conceptscby E. Walia  bKhanna Pub.aNew Delhic2009  a322  aIT