00315nam a22001217a 4500020001800000082001500018100002100033245004400054260003900098300001200137650002500149700001900174  a9788177587708  a005.43 BAC  aBach, Maurice J.  aThe design of the UNIX operating system  aNew DelhibPearson educationc2006  a481p. :  aUNIX (Computer file)  aMaurice J.Bach