Operating system concept 

 - USA  John Wiley & Sons  2011 
 - 725 p 
<br/><br/><label>ISBN: </label>9780470889206 
<br/><br/><label>Subjects--Topical Terms: </label><br/>USA
<br/><br/><label>LC Class. No.: </label>QA 76.76.O63/