00501nam a22001577a 4500020001800000082001500018100002100033245004400054260003900098300001200137650002500149700001900174942000700193999001700200952012600217  a9788177587708  a005.43 BAC  aBach, Maurice J.  aThe design of the UNIX operating system  aNew DelhibPearson educationc2006  a481p. :  aUNIX (Computer file)  aMaurice J.Bach  cBK  c11571d11571  001040708NFICaCLbCLcOSd2013-01-24eSaeed Book Bankg324.00l0o005.43 BACpSEECS011938r2013-02-07w2013-02-07yBK