Introduction to operating system concepts using MS-DOS. 

 - Quezon City :  PACER,  c1995. 
 - 199 p. : ill. 
 - Computers and you  ; book 2 .
<br/><br/> MS-DOS (Computer file) 
<br/><br/><label>ISBN: </label>9719089075 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating systems (Computers)