00341nam a2200145Ia 4500008004100000020001500041041001200056082001100068100001300079245004300092250000800135260003000143300000800173650001400181221030s9999    xx            000 0 und d  a9380016654  aEnglish  a105.23  aE. Walia 0aOperating System Conceptscby E. Walia  a2nd  bKhanna  Pub.aDelhic2010  a340  aComputers