00279nam a2200109 a 450000500170000002000150001708200220003210000210005424500440007526000310011930000190015020251203091724.0  a8120305167  a001.6425,bD, BAC  aBach, Maurice J.  aThe design of the Unix operating system  aDelhibPrentice-Hallc1994  axiv,471p, 24cm