Gerald Wohl Books

Structured Cobol: A Direct Approach

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Structured COBOL: focuses on structure and logic of programs and shows how to develop a program using top-down design with the help of a structure chart. Involves readers in programming a complete...

Basic

By Mike Murach, Gerald Wohl

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Structured Cobol

By Gerald, Wohl, Gerald Wohl

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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.