Black And White Squares???

[kloofnek]

What are these black and white squares one now often sees in papers and mags.also online,saw one on the AB widow before..something to do with scanning????

[kloofnek]

...windows...

[Mojo-Jo-Jo]

They are QR codes and you can scan them with your smartphone,
They're a bit like barcodes for iPhones and they give you info on the product or service.

[kloofnek]

We thought you scanned with a Smartphone...how does one actually do it,we have smartphones but can`t work it out

[Mamyalynne]

.

http://www.youtube.com/watch?v=4rqbRtwSEPg