Harmon, Margaret, <br/><br/>
Stretching man's mind :  a history of data processing / 
by Margaret Harmon. 
 - New York :  Manson/Charter,  1975. 
 - xv, 239 pages :  illustrations ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: page 215-217. 
<br/><br/><label>ISBN: </label>0884052826 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic data processing--History.<br/>Computers--History.<br/>Calculators--History.