You've surely seen these codes around either in print or digital format. Chris Sacca may call QR Codes the 'herpes of technology', but they're quite enabling; allowing you to link web pages, profiles, and even bodies of information to a specially formulated code that can be digitally scanned (in fact, you can scan the code
How do QR codes work—and what makes them dangerous
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Guide to QR Codes for Print & How They Work
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Demystifying QR Codes: What are they and how do they work - Yanko
How QR codes work and what makes them dangerous – a computer
How Does a QR Code Work and What Is a QR Code
Honeywell Redesigned The Barcode Scanner To Fit On Your Finger