O'Leary, Timothy J., Computing essentials, 2002-2003 / Timothy J. O'Leary, Linda I. O'Leary. - Introductory ed. - Boston : McGraw-Hill Irwin, c2002. - 1 v. (various pagings) : col. ill. ; Includes index. ISBN: 0072492104 (alk. paper) 0071131507 (international : alk. paper) Subjects--Topical Terms: Computers.Electronic data processing. LC Class. No.: QA76.5 / .O443 2002 Dewey Class. No.: 004