Duffy, Tim. <br/><br/>
Computing Concepts / 
by Tim Duffy. 
 - 2nd ed. 
 - California :  Wadsworth publishing Co.,  c1992. 
 - xi,102 p. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0534162002 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Microcomputers-programming.
<br/><br/><label>LC Class. No.: </label>QA76.6  / D82