00517nam a2200169 a 450000500170000002000180001708200130003510000160004824500730006426000460013730000250018369000240020896400160023299700130024899900190026195200670028020251203111357.0  a9788184082388  a020bRAT  aRatzan, lee  aUnderstanding information systemsbwhat they do and why we need them  aNew DelhibIndiana publishing housec2009  axvi,253p.c24cm.bHB  aInformation Science  bcdefg_  a150817 C  c123745d123745  00104070aPUbPUd2009-10-09g796.00l0o020 RATp150817yBK