Electronic message service systems :  hearings before the Subcommittee on Postal Personnel and Modernization of the Committee on Post Office and Civil Service, House of Representatives, Ninety-sixth Congress, second session .... 

 - Washington, D.C. :  United States Government Printing Office,  1980 
 - iv, 317 p. :  ill. ;  24 cm. 
<br/><br/> Hearings held Jan. 29-Apr. 1, 1980  Serial no. 96-78 
<br/><br/><label>Subjects--Corporate Names: </label><br/>United States Postal Service
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic mail systems--United States<br/>Telecommunication service--Equipment and supplies--United States
<br/><br/><label>Dewey Class. No.: </label>384.340973