Using SCO UNIX : Covers XENIX 

 - Berkeley     Osborne McGraw-Hill    1990 
 - 610p. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer Programming
<br/><br/><label>Dewey Class. No.: </label>005.282 LEB