Thomas Richards Books

The Meaning of Star Trek
The Meaning of Star Trek

By Thomas Richards

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"Where does Star Trek come from? Why is it so popular? How does it go about creating a coherent world? Literary critics may take literature seriously, but they often look down on popular forms such...

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Math Grade 4
Math Grade 4

By Spectrum Staff, Thomas Richards

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Math Grade 5
Math Grade 5

By Spectrum Staff, Thomas Richards

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Math Grade 8
Math Grade 8

By Spectrum Staff, Thomas Richards

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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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