Letwin D. <br/><br/>
Inside Operating System 

 - Second 
 - New Delhi  B.P.B. Publications  1988 
<br/><br/><label>ISBN: </label>0000022313 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Inside <br/> Operating <br/> System <br/> Unix<br/>First <br/>Operating Systems
<br/><br/><label>Dewey Class. No.: </label>1.6424