QR codes, or quick response codes, is a type of 2D bar code that may be decoded using your smartphone with a QR code reader. From being a tracking mechanism for auto parts, QR codes have proven to be very useful in marketing and convenience related applications that is more suitable for smartphone users. In the recent months, we have seen QR codes show up on marketing materials such as movie posters, promotional posters for various products, billboards, flyers, among other things. These have also been seen on newspaper ads, business cards, artwork, and other everyday things.
There are two main things that you have to have when you deal with QR codes:
1. A mobile phone with a camera and Internet connectivity
2. A QR code reader
Where do I get a reader ?
Most smartphones coming out nowadays have a QR code reader already installed. For some, you would need to download the reader and install it yourself.
Note that you would have to check on the compatibility of these readers with your phones as some readers work only on iPhones or Android phones. There are readers that work on the Symbian OS found on Nokia phones and Java found on lower end smart phones.