O'Leary J. Timothy Computing essentials: : making IT work for you: complete 2012. - New York: McGraw-Hill, 2012. - xxviii, 516p. Include indexes ISBN: 9780073516806 (13) 0073516805 (10) Subjects--Topical Terms: ComputersElectronic data processing. Dewey Class. No.: 004 / O42