Introduction to information systems / James A. O'Brien O'Brien, James A., 1936- 8832 O'Brien, James A., 1936- Introduction to information systems in business management 8834 Business Data processing 8360 Management Data processing 8833 HF5548.2 .O23 1994 658.05 21 Revised edition of: Introduction to information systems in business management. 6th ed. c1991 Includes bibliographical references and indexes 1994 Text xxii, 483, 19, 8 pages : eng