Frank Orme Harriss Books

OCR
OCR

By Frank Harriss

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Chemistry 11 13
Chemistry 11 13

By F. O. Harriss

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OCR B A2 Salters chemistry
OCR B A2 Salters chemistry

By Frank Orme Harriss

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- Improve your grades by focusing revision. - Build confidence and strengthen exam technique.

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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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