Input/output / 

 - Alexandria, Va. :  Time-Life Books,  c1990. 
 - 128 p. :  col. ill. ;  29 cm. 
 - Understanding computers .
<br/><br/>Includes bibliographical references (p. 123-125) and index. 
<br/><br/><label>ISBN: </label>0809475626 0809475634 (lib. bdg.) 
<br/><br/><label>LCCN: </label>89020196  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computers.<br/>Electronic data processing.
<br/><br/><label>LC Class. No.: </label>QA76  / .I486 1990 
<br/><br/><label>Dewey Class. No.: </label>004