Bach M. J., <br/><br/>
The design of the unit operating system  Textual Documents 

 - New Delhi  PHI Learning Pvt.  Ltd.,  2007 
 - xiv/471:  p.b.;  23*17. 
<br/><br/><label>ISBN: </label>9788120305768   
<br/><br/><label>Dewey Class. No.: </label>005.382  / BAC