Extending DOS :  a programmer's guide to protected-mode DOS / 
edited by Ray Duncan ... [et al.] ; illustrated by Darrell Judd. 
 - 2nd ed. 
 - Reading, Mass. :  Addison-Wesley,  c1992. 
 - vi, 538 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0201567989 (pbk.) 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>MS-DOS (Computer file)<br/>PC-DOS (Computer file)
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating systems (Computers).