Several months ago, I went to a local TEDx event. It was an opportunity to absorb wisdom, to learn from the experiences of others and... to participate in one of the sponsors' games. The latter could win me a trip for two to an exotic destination, but for a chance to grab the prize, I had to take a quiz at the sponsor's website. There was a poster with a huge QR code on it linking to the page. Then it occurred to me that I didn't have an app to scan the code with. "Why can't smartphone cameras scan these automatically?", I asked myself.
Well, ...
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