O'hara, Shelly , Hara, Shelly O <br/><br/>
Easy dos , disk operating system version 5.0 

 - USA  QUE  1992 
 - IX, 198P 
<br/><br/><label>ISBN: </label>0-88022-854-7 
<br/><br/><label>Dewey Class. No.: </label>005.42 HAR'E