00321nam a2200121Ia 4500008004100000040001700041041001200058082001700070100002100087245004200108260003800150300001100188230917s9999||||xx |||||||||||||| ||und||  e111493aMAIN  aEnglish  a005.43 H242S  aHarris, J Archer 0aSchaum's outline of operating systems  aNew DelhibTata McGraw-Hillc2002  a234 p.