ZDNet

Those barcode-looking things? They're called QR codes. Here's what they do.

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Investopedia

Quick Response (QR) Code: What They Are, How They Work, and Types

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...
Popular Science

How to make a QR code and share digital data with anyone, anywhere

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Business Insider

What is a QR code? A guide to the barcode's basics, why you're seeing it everywhere, and how to scan one

QR codes are a type of barcode, or scannable pattern, that contain various forms of data, like website links, account information, phone numbers, or even coupons. QR codes are found everywhere from ...