Grimes, Galen,  <br/><br/>
The first book DR DOS 6 

 - xxi, 408 pages :   illustrations ;   24 cm 
<br/><br/><label>ISBN: </label>0672273861 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer programmes
<br/><br/><label>Dewey Class. No.: </label>005.446