AT and T <br/><br/>
Unix system V release 4: BSD XENIX compatability guide 

 -  New Delhi : PHI,  1992 
 - 400 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Unix
<br/><br/><label>Dewey Class. No.: </label>005.43UNI  ATT.13