00331nam a2200133Ia 4500008004100000020001600041041001200057082001600069100001700085245004800102260002500150300000800175650001400183221030s9999    xx            000 0 und d  a00770483329  aEnglish  a105.23bHar  aJ. A. Harris 0aSchaum`s Operating Systemscby J. A. Harris  bTMHaNew Delhic2006  a234  aComputers