John Dewhirst Books

Child's Guide to the Commodore 64
Child's Guide to the Commodore 64

By John Dewhirst

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Explains how to use the computer language BASIC to write fundamental programs for the Commodore 64 computer.

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Child's Guide to the Amstrad Micro
Child's Guide to the Amstrad Micro

By James Ryan, John Dewhirst

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Explains how to use the computer language Basic to write fundamental programs for the Amstrad microcomputer.

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The Yuquot project
The Yuquot project

By

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Bradford City Memories
Bradford City Memories

By John Duehurst

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Tu Primer Libro ZX
Tu Primer Libro ZX

By Dewhirst

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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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