David Mayer Books

English Test Certification
English Test Certification

By David Mayer

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MuleSoft Certification
MuleSoft Certification

By David Mayer

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ASIS Certified
ASIS Certified

By David Mayer

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APICS Certified
APICS Certified

By David Mayer

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Symantec Certification
Symantec Certification

By David Mayer

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ISTQB Certification
ISTQB Certification

By David Mayer

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F5 Certification
F5 Certification

By David Mayer

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Check Point Certified
Check Point Certified

By David Mayer

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Related Articles from our Blog

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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