Martin Campbell Kelly Books

From mainframes to smartphones
From mainframes to smartphones

By Martin Campbell Kelly

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This compact history traces the computer industry from its origins in 1950 mainframes, through the establishment of standards beginning in 1965 and the introduction of personal computing in the 198...

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The computer age
The computer age

By Martin Campbell Kelly

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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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