Jeff Hewett Books

Signaling System No 7 C7/Ss7

By Jeff Hewitt, Jeff Hewett, Lee Dryburgh, Lee Dryburgh, Jeff Hewett

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A complete, practical guide to the world's most popular signaling system, including SIGTRAN, GSM-MAP, and Intelligent Networks. * Provides in-depth coverage of the SS7 protocols, including implemen...

Signaling System No. 7

By Jeff Hewett, Lee Dryburgh

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My Life As A Maryland Lawman

By Jeff Hewett

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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.