(CNN) -- A confused crossword puzzle. A psychedelic postage stamp. A bar code on drugs.
This is how a QR, or Quick Response, code may appear to most people. You may have noticed these black-and-white squares showing up in subway ads or in pages of magazines. Thanks to our growing addiction to our smartphones, you'll likely be seeing more of them.
QR codes are showing up in more and more places: posters, storefront window displays, TV advertisements, business cards, websites and even on T-shirts. When accessed with your phone, a QR code takes you to a landing page where you'll usually find special promotional content. Read More
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