A Key To Archive Formats Used At XANADU 
                                           
File        
Archiver                      
Extension   
Needed                        
----------------------------------------- 
.ARC       ARCE, PAK, PKXARC             
.ARJ       ARJ                           
.LZH       LHA, LHARC                    
.PAK       PAK                           
.SDN       PAK                           
  .ZIP       PKUNZIP                      
.ZOO       ZOO