----------------------------Original message---------------------------- 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