Davis, William S.,  1943- <br/><br/>
Information processing systems / 
William S. Davis. 
 - 2nd ed. 
 - Reading, Mass. :  Addison-Wesley,  1981. 
 - xix, 504 p. :  ill. ;  24 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0201031833 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic data processing.<br/>Electronic digital computers.