Mackie, Peter H.,  1936- <br/><br/>
The world of PC-DOS / 
Peter H. Mackie. 
 - Beaverton, Oregon :  Dilithium Press,  1984. 
 - 207 p. ;  22 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0880561459 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PC DOS (Computer operating system).