00273nam a2200109Ia 4500008004100000020001500041041000800056100002000064245004200084260002500126300001200151211209s2010    xx            000 0 und d  a8120305168  aeng  aBACH, MAURICE J  aDESIGN OF THE UNIX OPERATING  SYSTEM   aNEW DELHIbPHIc2010  aXIV 471