000 00261nam a2200097Ic 4500
008 240520s9999 xx 000 0 und d
100 1 _aMadrick and Ponayan
245 1 0 _aOperating systems /
_cPonayan Madrick
264 1 _bMcGraw - Hill Book Co.
_c1974
942 _cBK
999 _c19164
_d19164