Microsoft. <br/><br/>
Concise User's Guide:  Microsoft MS-DOS 6.22 
Microsoft 
 - USA :  Microsoft Corporation,  c1994. 
 - x, 270 p.:  [85] 
<br/><br/>This book is having appendixes. 
<br/><br/><label>Dewey Class. No.: </label>005.432  / MIC/CON