QR codes are a type of matrix barcode that can be scanned by smartphones and link to webpages or other online content. They were created in 1994 by Japanese company Denso-Wave to allow high-speed decoding. Scanning a QR code with a smartphone app will direct the user to whatever online destination has been encoded, such as a website, video, or contact information. While other companies have made similar codes, QR codes can be read by many different readers. Smartphones with cameras can read QR codes after downloading a free reader app. QR codes have become common in advertising and are used to drive people to websites, fan pages, and other online content from printed materials. Websites allow for free generation of QR codes that can