000 00307nam a2200133Ia 4500
008 160710s1985 xx 000 0 und d
082 _a001.642 PET
100 _aPETERSON,J.L.
245 _aOPERATING SYSTEM CONCEPT
250 _a2ND
260 _bADDISON WESLEY
_c1985
300 _a625
942 _2ddc
_cB
999 _c50376
_d50376