Morley, Deborah. Understanding computers : today and tomorrow / Deborah Morley, Charles S. Parker. - 13th ed. - Boston, MA : Course Technology, Cengage Learning, c2011. - 1 v. (various pagings) : col. ill. ; 28 cm. "Comprehensive." Includes index. ISBN: 9780538748100 (student ed.) 0538748109 (student ed.) LCCN: 2009942947 Subjects--Topical Terms: Computers.Electronic data processing. LC Class. No.: QA76.5 / .P318 2011 Dewey Class. No.: 004