00394nam a22001337a 45000050016000000200022000160350013000380370013000511000018000642450114000822500012001962600027002083000025002352012021309189.0  a9812359737c00.00  aA-980738  aDPLbENG  aDeitel, H. M.  aOperating system :bIncluding case in Unix, OS-2, MS-Dos, Macintosh, VM, MVS, Open systems /cby H. M. Dietel  a2nd ed.  bAddison Wesley Longman  axxvi, 853p.c18 cms.