The two files in this directory, -rw-r--r-- 1 ljdickey 136816 Apr 18 15:51 postscrp.arc -rw-r--r-- 1 ljdickey 130044 Apr 18 15:54 postscript.tar.Z are intended to have the same content. The first, "postscrp.arc", has been compressed with the famous ARC program of the PC world. The second, "postscript.tar.Z", is a compressed Tape ARchive file. Pick your packaging