QR code is a square image with some information encoded in it. It can be regular text, a URL, a phone number, coordinates of a certain location or an entire business card. The shape and structure of QR codes makes it possible to scan them using camera-enabled mobile phones. All you need to access the content of a QR code is to point the camera at it.
QR codes (from Quick Response) were invented in 1994 by a Japanese company called Denso-Wave. In Japan, QR codes became commonplace in early 2000’s: they were used in ads, product packaging, booklets, games, yellow pages and in millions of other ways. And when powerful smartphones featuring built-in cameras became widely available, QR codes also started to conquer the world.
Today, you can see a lot of QR codes in ads: for instance, they contain the contact details of advertisers that can be immediately saved to your device or links to product details on the official site. QR codes can also be placed on clothes (e.g. a link to your site, your social network profile, phone, blog URL or your entire business card).
To read QR codes, you will first need to download QR scanning software to your mobile phone. You can find links to some programs of this type on the right-hand side of this page.