System Software 
Tom Alexander 
 - 1st 
 -  Crescent  2014 
 - 276 
<br/><br/><label>ISBN: </label>9788183423175 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer
<br/><br/><label>Dewey Class. No.: </label>005.43  / ALE