QR codes -- the abbreviation stands for "quick response" -- were invented in Japan in the 1990s. They were first used by the automotive industry to manage production but have spread everywhere.

40 QR Code Uses. On your business card On product packaging. Posted in store to receive a coupon. Posted in store to invite to review. At a live event conference booth ...

QR codes, the square bar codes that can be scanned and read by smartphones, are seemingly used everywhere: to board flights, enter concerts and look at restaurant menus. But scammers trying to ...