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        Karen & MAPS-L:
 
        You mention USGS series.  Do you mean topographic or
        geologic/hedrographic?  i.e., the infamous I, GP, GQ, MF series.
        Hanging files?  Hanging vertical file cabinet Pendaflex-like
        hanging files (8 1/2 X 11)? or the LARGE Ulrich Planfiles which can
        store USGS topo quads?
 
        If you mean the folded geologic maps, I don't think you'll save any
        more room by any other method than vertical file cabinets.
        However, there are those who swear by the Ulrich planfiles (Joanne
        Perry at Oregon State - Covallis and Chris Ziegler - University of
        Arizona).  They may save space but one is always explaining to the
        public how to open the drawers.  That's one thing with
        Hamiltion/Mayline flat cases you never have to do.
 
        JAMES O MINTON