Maria Langer Books

PageMill 3 for Macintosh & Windows

By Maria Langer

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America Online 3 for Macintosh

By Maria Langer

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America Online 3 for Windows 95

By Maria Langer

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Database publishing with FileMaker Pro on the web

By Maria Langer

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Excel 2001 for Macintosh

By Maria Langer

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A guide for Mac users explores the spreadsheet program's updated features while explaining how to enter, manipulate, and display data using Microsoft Excel 2001.

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.