Introduction to data processing / Beryl Robichaud, Eugene Muscat, Alix-Marie Hall. Robichaud, Beryl. Muscat, Eugene, 1944- joint author. Hall, Alix-Marie, 1941- joint author. Electronic data processing. HF5548.2 .R6 1977 651.8 ROI Includes index. New York : Gregg Division, McGraw-Hill, c1977. c1977. 1977 Text vii, 345 p. : eng