Walker, Roger S. Understanding computer science / by Roger S. Walker ; managing editor, Gerald Luecke ; editor, Charles W. Battle. - Indianapolis : Howard W. Sams aqnd company, c1984. - iv, 274 p. : ill. ; 21 cm. - Understanding series. . - Understanding series. . Includes index. Includes bibliographical references. ISBN: 0672270110 (pbk.) Subjects--Topical Terms: Computers.Electronic data processing.