A quick QR code scan can resolve all these questions and more. Think of this tech as a smart barcode. QR codes existed long before smartphones, and your device can scan them right out of the box.

It's important to note that a QR code consists of black squares arranged on a white background. It is not the barcode that you see on the back of packages. Our reader above asked us to recommend ...

A quick QR code scan can resolve all these questions and more. Think of this tech as a smart barcode. QR codes existed long before smartphones, and your device can scan them right out of the box.

A quick QR code scan can resolve all these questions and more. Think of this tech as a smart barcode. QR codes existed long before smartphones, and your device can scan them right out of the box.