QR code (abbreviated from Quick Response Code) is the trademark for a type of matrix barcode (or two-dimensional barcode) first designed for the automotive industry in Japan. A barcode is an optically machine-readable label that is attached to an item and that records information related to that item. The information encoded by a QR code may be made up of four standardized types ("modes") of data (numeric, alphanumeric, byte / binary, kanji) or, through supported extensions, virtually any type of data.
I noticed a lot of QR codes around my house and realised I have only ever used them once or twice, and that was only for the novelty value. I was just wondering how many people on here use them, find them convenient or useful. I like the idea of the Xbox One Kinect being able to read QR codes for coupons/DLC codes instead of having to input them manually, but that is only convenient compared to the pain that inputting 20+ letters or numbers with a controller using an on-screen keyboard presents.