Bar codes are making a comeback. Well sort of. They're not your traditional bar code. I had an opportunity to speak with execs at a Long Beach, Calif.-based advertising agency attempting to cozy-up to ...

Is it a printing error? A pixilated maze? One of those puzzles where you have to cross your eyes to see the hidden image? Two-dimensional matrix bar codes are expanding into the mainstream. You can ...

Mosaics of black-and-white squares that look like tiny crossword puzzles are cropping up everywhere, from bus stop ads and cereal boxes to stickers on bananas, and they're changing the way people get ...

You might have come across QR codes and might also know the unique benefits of using them but you wouldn't have got the right app to make use of your mobile phone to read the QR codes. Here is a list ...