Jack J. Purdum Books

Basic-80 and CP M

By Jack J. Purdum

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Arduino Projects for Amateur Radio

By Jack J. Purdum

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Do you want to increase the functionality and value of your ham radio without spending a lot of money? This book will show you how! Arduino Projects for Amateur Radio is filled with step-by-step mi...

Beginning C 3.0

By Jack Purdum, Jack J. Purdum

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Quick C Programming

By Jack J. Purdum

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Accounting & finance

By Jack J. Purdum

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Visual Basic .NET Primer Plus

By Jack Purdum, Jack J. Purdum

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C programming guide

By Jack J. Purdum

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C programmer's library

By Jack J. Purdum

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C standard library

By Jack J. Purdum

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C programming guide

By Jack J. Jack Jay Purdum, Jack J. Purdum

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

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.