O' Leary, Timothy J. <br/><br/>
Computing essentials/ 
by Timothy J. O'Leary  
 - 2005 introductory edition 
 - U.S.A.:  McGraw-Hill,  c2005. 
 - xxviii, 376p.:  ill.;  28cm. 
<br/><br/> Includes appendix, glossary and index. 
<br/><br/><label>ISBN: </label>0-07-283612-1 
<br/><br/><label>Dewey Class. No.: </label>BCir. 004  / Ol2c