O'Leavy, Timothy J. <br/><br/>
McGraw-Hill computing essentials / 
Timothy J. O'Leavy. 
 - New York :  Mitchell McGraw-Hill,  1993. 
 - xxi, 284 p. :  col. ill. ;  26 cm. 
<br/><br/>Includes index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computers.<br/>Computer software.<br/>Electronic data processing.