Sack, John R. <br/><br/>
Fundamentals of IBM computing systems / 
John Sack. 
 - Chicago :  Science Research Associates,  c1985. 
 - xviii, 401 p. : 
<br/><br/><label>ISBN: </label>057421450X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic digital computers.
<br/><br/><label>Dewey Class. No.: </label>004.125  / Fu