The following is a Plus Edition article written by and copyright by Dick Eastman.
QR Codes have many uses. They are often used on business cards and also in printed advertisements. Mercedes-Benz attaches them to automobiles so that rescue crews can use their smartphones or tablets to instantly retrieve information on how to make a speedy and safe recovery when using the “jaws of life” to extricate victims from an auto accident. (See http://www.gizmag.com/mercedes-benz-qr-codes/27675/.) Now genealogists have recently been finding QR Codes on tombstones and on columbariums
NOTE: A columbarium is is a place for storage of cinerary urns (i.e. urns holding a deceased’s cremated remains).
A QR Code (abbreviated from Quick Response Code) is the trademark for a type of matrix barcode (or two-dimensional code) first designed for the automotive industry. You can see a typical QR Code to the right. You probably have seen similar QR Codes on all sorts of products and advertisements. To use a QR Code, use a smartphone (typically an Apple iPhone or an Android phone) with appropriate software installed to take a close-up picture of the QR Code. The software reads the QR Code and then opens a web browser that displays the web page address that is embedded within the dots of the QR Code.