V. A. Kral Books

Selected papers of V.A. Kral
Selected papers of V.A. Kral

By V. A. Kral

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Agp System
Agp System

By William Guy, V. A. Kral, Thomas A. Ban

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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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