Ever seen those black and white checkered boxes on Android web sites? They’re QR or “Quick Response” codes, and they can be read from your phone using the Barcode Scanner application from the Android Market. You can scan the codes that are published on web sites and use the results for all kinds of things. QR codes can be encoded with any short piece of text. This application will allow you to browse to a URL, save a contact, or copy the text to use in another application.