00270nam a2200109Ia 4500008004100000100001500041245004300056260002300099260000900122546001200131999001700143170619s9999    xx            000 0 und d  aSinghal- M 0aAdvanced Concepts in Operating Systems  bPEARSON EDU. DELHI  c2011  aENGLISH  c23360d23360