Jamsa, Kris. <br/><br/>
Simply DOS / 
Kris Jamsa. 
 - Manila :  Seven R's Publishing Co.,  c1991. 
 - 212 p. : ill. 
<br/><br/> Includes appendix and index. 
<br/><br/><label>ISBN: </label>971-611-007-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>operating systems (computers)