Parker, Charles S. Understanding computers & information processing :today and tomorrow / Charles S. Parker. - 4th ed. - Fort Worth : Dryden Press, 1992. - xxvii, p. : ill. (some col.), col. maps ; 27 cm. - The Dryden Press series in information systems . Includes index. ISBN: 0030557534 Subjects--Topical Terms: Computers.Electronic data processing. Dewey Class. No.: 004