00492nam a2200169 a 450000500170000002000150001708200180003210000210005024500400007126000350011130000250014669000270017196400160019899700190021499900170023395200720025020251203110625.0  a8120305167  a005.282UbBAC  aBach, Maurice J.  aDesign of the Unix Operating System  aDelhibPearson Educationc1990  axiv,471p.c24 cm. PB  aOperating System, Unix  bcdefg_  a114869 LIBSC C  c96727d96727  00104070aPUbPUd2005-09-13g156.00l0o005.282U BACp114869yBK