Quick Response codes are a type of bar code that is becoming widely used by businesses in advertisements, trade show booths, and other situations where quick and convenient access to additional information is required. Typically, a QR code contains a URL that, when decoded on your tablet or smartphone, takes you to a website where you can obtain additional information about the company, product, or service that is being promoted at the trade show.
QR Codes vs. One-Dimensional Bar Codes
One-dimensional bar codes, such as the UPC codes found on packaged foods, are nearly ubiquitous; however, their utility is limited by their one-dimensionality, which in turn limits the amount of data they can contain. Two-dimensional bar codes like QR codes can contain much more information.
There are many QR code reader apps available for iOS devices such as iPhones. Search for them on the App Store by using terms such as "QR." Free QR code reader applications for iOS include QR Reader, NeoReader, and QR Scanner.
Free QR code reader apps for Google Android devices such as Samsung Galaxy III, Motorola Droid, and HTC One include Barcode Scanner, Google Goggles, and QR Droid. Search for additional apps in the Play Store by using "QR" as your search term.
Microsoft Windows Phone 7
Microsoft's Windows Phone 7 comes with Bing Search, which can decode QR codes. The Search button, marked with a magnifying glass, launches the app, and the Vision button, marked with an eye, launches the QR code reader function.
Scanning a QR Code at a Trade Show
Approach a tradeshow booth or table. Locate a QR code. Launch the QR reader app on your device and point its camera at the QR code. Aim to position the device so that it’s parallel to the QR code. Press the app’s “Take Picture” button if it doesn’t take the picture automatically.