Charles H. Duncan Books

Keyboarding Typewriting Advanced N 56
South Western College Keyboarding
College Keyboarding Keyboarding Course
New Spirit
New Spirit

By Gail Stavitsky, Charles H. Duncan, Laurette E. McCarthy

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The International Exhibition of Modern Art, better known as the Armory Show, consisted of more than 1,300 works of art by American and European artists. During its original run in New York, Chicago...

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Autotherapy
Autotherapy

By Charles H. Duncan

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South-Western College Keyboarding: Formatting Course
Autotherapy Classic Reprint
Autotherapy
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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.

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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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