Research Digital - <br/><br/>
DR Dos 6.0: operating system for personal computers user guide 

 - 2nd 
 - California:  Digital Research  ,1991. 
 - xix,428p.  NA  Original 
<br/><br/> Includes Index 
<br/><br/><label>ISBN: </label>11822004001 
<br/><br/><label>Subjects--Personal Names: </label><br/>Computer Science
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer science, information & general works
<br/><br/><label>Dewey Class. No.: </label>005.44 DIG