Parsons, June. <br/><br/>
Computer concepts 2012 :  brief / 
June  Parsons and Dan Oja. 
 - International ed. 
 - USA :  Cengage,  2012. 
<br/><br/> Includes references ( p.246-255) and Index. 
<br/><br/><label>ISBN: </label>0760055009 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Compuserve.<br/>Computers.
<br/><br/><label>LC Class. No.: </label>QA76.57  / .C65