Brian Portnoy Books

The geometry of wealth
The geometry of wealth

By Brian Portnoy

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The Investors Paradox
The Investors Paradox

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Investor s Paradox
Investor s Paradox

By Brian Portnoy

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What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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