DEAR MISS MANNERS: I received a wedding invitation with no physical address that required me to scan a QR code to confirm my attendance. I looked up the address and wrote a formal response accepting ...

What is a QR code? A QR code (short for Quick Response code) is a two-dimensional barcode that can be read by your smartphone camera. QR codes provide quick access to product information, promotions ...

You see QR codes just about everywhere these days. The square barcodes show up everywhere: real estate listings, TV ads and social media posts touting what look like great deals on must-have items.

Your Android or iPhone can probably already scan QR codes. Here's how to do it no matter what phone you have. When he's not testing the latest phones or phone cameras, Andrew can normally be found ...