Quick Response (QR) Codes are two-dimensional barcodes which encode text content. QR Codes can contain over 4,000 characters, and can be scanned by any compatible barcode scanner in a fraction of a second. QR Codes are used for asset tagging, proof of identity, event ticketing, interactive museum exhibits, orienteering, school quizzes, business cards and much more! Once encoded, the URL or data withing the QR Code is permanent and almost impossible to modify.