Designed as a high-tech marketing resource, QR (quick response) codes have many useful applications. These (usually) black-and-white algorithmic codes are gateways to a potential multimedia nirvana.

QR codes have been with us for a long time now, and after passing through their Gardenesque hype cycle of inappropriate usage, have now settled down to be an important and ubiquitous part of life.

Also, see how to quickly get Service code information by using your phone to scan the display’s QR codes. Understanding the difference between a critical or non-critical Service code can help you ...

Quick Share, Google's version of AirDrop, could soon receive an update to support QR codes for easier device connection. Wi-Fi connections are faster for file transfers, but Quick Share now offers ...

Enter this interesting project from [Predrag Mijatovic], which uses a few scripts to automatically set up a new encrypted guest WiFi network and present the appropriate QR code on an OLED display ...