00393nam a2200157Ia 4500003000500000008004100005020001000046040000900056041001200065082002200077100002000099245007800119250000800197260000900205650002100214NDCL180829s9999||||ii |||||||||||||| ||eng||  a10109  aNDCL  aEnglish  a005.4 BL216th ed  aBeck, Leland L. 0aSystems software : an introduction to systems programmingcLeland L. Beck  a3rd  c2005  aComputer Science