Computer currents,  Navigating Tomorrow,s Technology 
Beekman,George 
 - 20th ed. 
 - United States Of America  Benjamin/Cummings Publishing Company  1994 
 - xxxi, 298p 
<br/><br/><label>ISBN: </label>0-8053-2448-8 
<br/><br/><label>Dewey Class. No.: </label>004 BEE