Quarterman, John S.,  1954- <br/><br/>
UNIX, POSIX, and open systems  the open standards puzzle 
John S. Quarterman, Susanne Wilhelm 
 - Reading, Mass.  Addison-Wesley  1993 
 - 416 p. : ill. ; 24 cm. 
<br/><br/><label>ISBN: </label>0201527723  RM119.03 
<br/><br/><label>LCCN: </label>92-19965 
<br/><br/><label>Subjects--Topical Terms: </label><br/>UNIX (Computer file)<br/>Operating systems (Computers)--Standards--United States