Each of the QR codes — square barcodes made readable by smartphone ... readily accessible public locations" with a small DARPA logo and the words "Start your Quest for $40,000." ...

QR codes — or "Quick Response" codes — are square-shaped barcodes that can be ... change the shape and color, or add a logo to customize your QR code. 3. When you're finished, click Download ...

QR codes are most reliable when square, but non-standard shapes are mostly fine. Google has clearly tested this thoroughly before pushing out with Android 16 Developer Preview 1. current Wi-Fi ...