Jack Keller Books

Teeth
Teeth

By Jack Keller

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Tom Edison's bright ideas
Tom Edison's bright ideas

By Keller Jack

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A biography of the inventor, for beginning readers, focusing on his research with electricity and his invention of the incandescent electrical light.

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Home Winemaking
Home Winemaking

By Jack Keller

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Learn Servlets
Learn Servlets

By Jack Keller

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Learn TestNG
Learn TestNG

By Jack Keller

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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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