Don Cassel Books

Programming language one.
Programming language one.

By Don Cassel

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PL 1
PL 1

By Don Cassel

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Source 1 Lotus 1-2-3 Rel 3.1
Source 1 Lotus 1-2-3 Rel 3.1

By Don Cassel

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Source 1-WordPerfect 6.0
Source 1-WordPerfect 6.0

By Don Cassel

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DOS 5.0
DOS 5.0

By Don Cassel

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Basic
Basic

By Don Cassel

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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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