Douglas Hergert Books

Microsoft Excel
Microsoft Excel

By Douglas Hergert

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From Kabul to Dakar
From Kabul to Dakar

By Douglas Hergert

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DBase III plus
DBase III plus

By Douglas Hergert

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Microsoft QuickBASIC
Microsoft QuickBASIC

By Douglas Hergert

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DBASE IV
DBASE IV

By Douglas Hergert

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Microsoft QuickBASIC
Microsoft QuickBASIC

By Douglas Hergert

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How to use Windows
How to use Windows

By Douglas Hergert

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How to use Prodigy
How to use Prodigy

By Douglas Hergert

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How to use Windows 95
How to use Windows 95

By Douglas Hergert

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Related Articles from our Blog

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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