Automatic data processing activities summary in the United States government 

 - Washington, D.C. :  United States Government Printing Office,  1981 
 - 101 p. ;  22 cm. 
<br/><br/> Automated data and telecommunication service 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication<br/>Digital communications
<br/><br/><label>Dewey Class. No.: </label>621.382