A fairly common standard: 14 character codabar mod 10 character 1: 2=patron 3=item characters 2-5: your 4 digit organization /location code characters 6-13: actual number of item character 14: check digit Whether you use codabar mod 10 or just a plain 3 of 9, a 14 character barcode is pretty standard. With the plain old 3 of 9 (code39) symbology, there is generally no check digit. Characters 2-5 should be unique to your geographic area, if possible. We have a system in Kansas of tracking this, but it is very recent. Your state/region may or may not have information like this. http://www.bcmccoy.com/library-barcodes.html - Joe <snip> My question is what kind of symbology does Koha support? I've been given options from the vendor like Code 39 or Codabar. Could you please advise what type of symbology I need to order? Thanks so much, Janet Deavor