You've probably noticed a square barcode pasted to a graffitied light pole or on the back of a business card. That pixelated code, shaped in a square, is called a QR ...

What is a QR Code? A quick-response code (QR code) is a type of barcode that contains data for a locator, an identifier, and web tracking. QR codes have been around for a long time. They were first ...

New York Post newsroom and editorial staff were not involved in the creation of this content. A small family-run sandwich shop has updated its menu to be available by QR code. Customers can scan the ...