Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!caen!news.cs.indiana.edu!ux1.cso.uiuc.edu!uxa.cso.uiuc.edu!kjs39186
From: kjs39186@uxa.cso.uiuc.edu (Kent Squires)
Newsgroups: comp.sys.apple2
Subject: FTP: ummts.cc.umich.edu
Message-ID: <1991Mar17.042651.20037@ux1.cso.uiuc.edu>
Date: 17 Mar 91 04:26:51 GMT
Sender: usenet@ux1.cso.uiuc.edu (News)
Organization: University of Illinois at Urbana
Lines: 2

On the FTP site  ummts.cc.umich.edu  under the directory pc5, the files
all have a 2 character prefix.  What do those stand for?