Sumner, Mary. <br/><br/>
Computers  concepts and uses 
Mary Sumner. 
 - Englewood Cliffs, N.J.  Prentice-Hall  c1985. 
 - 555 p.  ill. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic data processing<br/>Computers