Brian Surratt at Texadata mentions he is having some success scanning barcodes on the back of books when doing ISBN searches on OCLC. It is not yet 100% accurate, many of these numnbers are in the 024 field. Yet it is working and will only get better with time.I've been using barcode scans in ISBN searching on my Z39.50 client with mixed results. OCLC is creating 13 digit codes based on the 10 digit input code. They are also moving those in 024 to 020. Few if any institutions will do this work. Using scans in Z30.50 searches will be uncertain for many years to come. Maybe the profiles could do some remapping, have an ISBN search hit both the 020 and 024 fields?