Cash registers have been scanning barcodes on food, clothes, and our other purchases for 50 years.

QR (Quick Response) codes are everywhere these days. You'll spot them on restaurant menus, business cards, product packages, and even concert tickets. A big reason they've caught on is convenience.

Case Western Reserve University has rolled out updates to its recycling program, making it easier for the campus community to reduce waste. A new QR code system on landfill bin signs allows students ...