Shelly, Gary B. <br/><br/>
Essential computer concepts 

 - Boston :  Boyd & Fraser Publishing Company ,  1990. 
 - varius pagings  ill. ;  24cm. 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>0-87835-456-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electroni digital computer
<br/><br/><label>LC Class. No.: </label>QA76.5.S458