![]() ![]() More recently, QR codes are a crucial component of Covid-19 tracking programs in many countries, offering people a speedy way to check-in at different locations. Nowadays, QR codes are used for everything from augmented reality advertisements to authenticating designer jeans, to sharing Wi-Fi passwords. They were invented in 1994, grew insanely popular, disappeared, and then made a comeback-mostly because you no longer need a dedicated app to use them. The initials stand for Quick Response, and these unmistakable square codes were designed to pack lots of information into an easy and fast-scanning format. Chances are you've seen a distinctive black-and-white square plastered somewhere on a menu, box, or subway station. ![]()
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