Haag, Stephen <br/><br/>Information systems essentials / Stephen Haag and Maeve Cummings.  -- Boston:  McGrawHill.,  2006. <br/>xxx, 462p.;  col. ill.;  28 cm. <br/><br/> Includes index. <br/><br/><label>ISBN: </label>9780071117937 <br/><br/><label>Subjects--Topical Terms: </label><br/>Information essentials.<br/><br/><label>Dewey Class. No.: </label>Res 658.4038 H111 2006