Microsoft Tag is similar to QR Codes, however Microsoft is using HCCB bar codes so instead of storing the data using square pixels it uses triangle shapes and colours. The difference is that Microsoft Tags don’t actually store the information. All it stores is a unique ID which it then sends to Microsoft’s servers. This way, you can include much more information, and more variety of information, then if it was just on the tag itself.

Tag is available in the Android Market on your Android phone by searching for ‘Microsoft Tag’.