O'Brien, James A. <br/><br/>
PC software workbook / 

 - 2nd ed. 
 - Boston:  Irwin,  1989. 
 - xii, 239 p., 
<br/><br/><label>ISBN: </label>025606704X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating system.
<br/><br/><label>Dewey Class. No.: </label>005.44