UPCs, EANs, ISBNs, and ASINS http://www.amazon.com/gp/seller/asin-upc-isbn-info.html What is this? What are ASINs, ISBNs, and UPCs? - Amazon.com the ISBN number http://www.amazon.com/gp/seller/asin-upc-isbn-info.html http://www.amazon.com/gp/seller/asin-upc-isbn-info.html ASIN