00572nam a2200181 a 450000500170000002000140001708200160003110000160004724500730006326000460013630000250018269000420020769000230024996400160027299700130028899900190030195200700032020251203111357.0  a818408238  a025.04bRAT  aRatzan, Lee  aUnderstanding information systemsbwhat they do and why we need them  aNew delhibIndiana publishing housec2009  axvi,253p.c24cm.bHB  aInformation storage & retrival system  aInformation system  bcdefg_  a151280 C  c123746d123746  00104070aPUbPUd2009-10-12g796.00l0o025.04 RATp151280yBK