----------------------------Original message---------------------------- Dear Maps-l Folks Bar codes are located on the bottom right hand corner of new USGS topos. Are these used for an internal inventory system for the USGS, or are they a link to a record for the map. If they are a link, which system can read the bar code? Is there a way to transfer the information into our library data base as an aid to catalogers? Any information provided is appreciated. Thanks Marilee Ohnstad [log in to unmask]