QR Code

A two-dimensional barcode that encodes information such as text, URLs, or other data in a square matrix of black and white modules. In accessibility contexts, QR codes serve as a bridge between physical objects and digital information — they can be placed on tactile graphics to provide audio labels for blind users who do not read Braille, embedded in signage for wayfinding, or used to link physical materials to accessible digital alternatives. QR codes are particularly useful in assistive technology because they can be scanned with standard smartphone cameras, requiring no specialised hardware.