Christopher, Ken W. <br/><br/>
The new DOS 4.0  [Books]. 
Ken W. Christopher, Barry A. Feigenbaum [and] Shon O. Saliga. 
 - New York  John Wiley & Sons  1989 
 - Pages: 515 
<br/><br/><label>ISBN: </label>047150257X  0.00 
<br/><br/><label>Subjects--Personal Names: </label><br/>DOS 4 (Computer operating system).<br/>PC-DOS (Computer operating system).
<br/><br/><label>Dewey Class. No.: </label>QA/76.76.O63  / CHR