Microsoft MS-Dos, operating system version 5.0. :  user's guide and reference 

 - USA :  Microsoft corporation,  1991 
 - xiii, 668 pages ;  23 cm 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating systems (Computers) -- Software
<br/><br/><label>LC Class. No.: </label>QA76.76.O63 M53