Microsoft Corporation <br/><br/>
Microsoft MS-DOS: User's guide; operating system version 4.01 / 
Microsoft Corporation 
 - n.p., 1988 
 - 600p  ill.  23x38 
<br/><br/>Includes index  
<br/><br/><label>Subjects--Topical Terms: </label><br/>MS DOS
<br/><br/><label>Dewey Class. No.: </label>001.6425  / MIC