DISK operating system: user's guide and reference version 5.00 

 - [America]  IBM  1991 
 - xxii, 664 p. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>134728 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dos<br/> Operating system
<br/><br/><label>Dewey Class. No.: </label>5.432  / DIS