Impact Link You know those little squares with the seemingly randomized layout of black and ... Not the barcodes, the wacky grid things? Those are QR codes, or quick response codes, and they ...

QR codes can be really handy. A grid of seemingly random black-and-white squares can hold enough information to store website URLs, contact information, email addresses, pre-defined SMS text ...

Video after the break. As you might expect, the version 40 QR code he ended up using is much larger than the ones you normally see. Consisting of a 171 by 171 grid, it’s the largest version that ...