Martinito, Crisleo John. <br/><br/>
Basic concepts of D.O.S. user's guide / 
Crisleo John Martinito. 
 - =s.l.= 
 -  St. Cecilia's Pub,  c1998. 
 - 117 p. : ill. 
 - Computer wizard ; third year .
<br/><br/> Includes references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating systems (Computers)