Introduction to computer and information systems 
/by Robert A. Szymanski 
 - Columbus:  Merrill Publishing Company,  1988. 
 - xxxi,577 p. :  ill.,col. ;  26 cm. 
<br/><br/><label>ISBN: </label>0675207681 
<br/><br/><label>Dewey Class. No.: </label>001.61