Prasanalakshmi, B. <br/><br/>
Computer operating system / 

 - New Delhi,  CBS Publisher,  c2010. 
 - xv, 388p. ;  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>9788123918464 
<br/><br/><label>Dewey Class. No.: </label>005.2