What are 2D barcodes

2D barcodes are 2 dimensional images made up of little squares, which when scanned by a mobile phone (with the decoder installed) will action a task, usuallu opening the devices web browser and sending the user to a webpage or mobile micro site.

Looking for 2d barcode scanners?

Goto i-nigma scanner ,
iPhone users try 'zxing' (Zebra) 2d barcode reader in the app store.