Business information processing systems : an introduction to data processing / C. Orville Elliott, Robert S. Wasley. Elliott, C. Orville. (Clarence Orville) Wasley, Robert S., joint author. Business Data processing. Management information systems. Computers. 651.26 ELB Includes bibliographies and index. Homewood, Ill. : R. D. Irwin, 1975. 1975. 1975 Text xix, 568 p. ; eng The Irwin series in information and decision sciences