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plural ASINs
Initialism of Amazon Standard Identification Number. quotations examples
If you're looking for a book, the ASIN is the same as the book's International Standard Book Number (ISBN), which is located above the bar code, typically on the book's back cover or inside flap.
2004, Michael Miller, 501 Web Site Secrets: Unleash the Power of Google, Amazon, eBay and More, John Wiley & Sons, page 332