00455nam 2228590 450000100060000000300230000600500090002900800410003808200080007907200200008710000140010726000340012125000060015524500210016165000200018265000470020265000260024928590StarLibrary Marc Built20180420201711 ||||| |||||||||||amh  a005 agetting started aMicrosoft bMICROSOFT CORPO RATION c1991 a2 amicrosoft ms-dos agetting started alearning about disks files and directories alearning about ms-dos