00432pamaa2200157 4500 0000015919 20100106090000.0 0071145664 658.4038 OBR HF5548.2 OBR 1997 O'Brien Introduction to information systems James A. O'Brien.. 8th ed. Boston: Irwin McGraw Hill, 1997. xxii, 530p.; 26 cm. Business -- Data processing