Haag, Stephen. <br/><br/>
Information technology / 
Haag, Stephen 
 - New York :  McGraw-Hill,  1996 
 - 332 p. :  illus 
<br/><br/><label>ISBN: </label>0442293917 0070254478 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.<br/>Telecommunication.<br/>Computer networks.<br/>Electronic Mail Systems.
<br/><br/><label>Dewey Class. No.: </label>621.C578  / H111I