Ritchie, C  . <br/><br/>
Operating Systems : incorporating UNIX and MS-DOS /   Textual Documents 
Ritchie C. 
 - 2 /   . 
 - New Delhi :   BPB ,   1995. 
 - NULL ;   NULL. 
<br/><br/><label>Subjects--Index Terms: </label>Operating System 
<br/><br/><label>Dewey Class. No.: </label>005.43  / RIT