Duffy, Tim. <br/><br/>
Computing concepts / 
Tim Duffy, Traci Berchelmann. 
 - 2nd ed. 
 - Belmont, Calif. :  Wadsworth Pub. Co.,  c1995. 
 - xvi, 372 p. :  ill. (some col.) ;  28 cm. 
 - Wadsworth series in microcomputer applications .
 - Duffy, Tim.  Wadsworth series in microcomputer applications. .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0534219128 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic data processing.