Thomas Johnsen Books

Purchasing and supply chain management

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"Supply chain management is a cross-functional business concept that includes, for example, logistics and operations management. In many organizations purchasing is now part of the supply chain man...

Purchasing and Supply Chain Management

By Thomas Johnsen

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Purchasing and Supply Chain Management

By Joe Miemczyk, Mickey Howard, Thomas Johnsen

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Reducing Cost of Energy in the Offshore Wind Energy Sector

By Kannan Govindan, Thomas Johnsen, Jan Stentoft, Ram Narasimhan, Chee Yew Wong

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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.