Quentin Docter Books

CompTIA A Complete Study Guide
CompTIA A complete study guide
CompTIA Security Certification Kit
CompTIA A complete study guide
CompTIA A complete study guide

By Quentin Docter

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"The essential study tool for the 2009 edition of the CompTIA A+ exam The CompTIA A+ certification is the industry standard in terms of measuring a technician's hardware and software knowledge. As...

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MCSE
MCSE

By Anil Desai, Quentin Docter, James Chellis

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Solaris 9 Sun Certified System Administrator Study Guide
The Complete PC Upgrade and Maintenance Guide 16th Edition
CompTIA A practice tests
CompTIA A practice tests

By Quentin Docter

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"Practice tests are an excellent way for certification candidates to prepare for taking exams, and the well-crafted questions and detailed answers you'll find inside will help give you the confiden...

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CompTIA A Complete Deluxe Study Guide Recommended Courseware Exams 220 801 and 220 802
CompTIA IT Fundamentals Study Guide

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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.

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