The ASIN (Amazon Standard Identification Number) is the common identification number of almost all products which can be found on Amazon.com. Books are the only exception, the equivalent number for books is called ISBN (International Standard Book Number).
It is a unique sequence of 10 letters/numbers or both which is a big help for business partners in the field of e-commerce, even though the ASIN is not internationally standardised.
This number is determined according to the guidelines of Amazon. The ASIN, due to the fact that it is not officially recognized all around the world, it can be transferred to a EAN easily and at any time. This is possible the other way round as well. The EAN (European Article Number) is usually converted into a barcode which is machine-readable. The ASIN can be found on the Amazon page of the particular product. This number can also be found in the URL of the web page of the product.