When I showed my friends, the first thing out of my mouth was, “Did you know you can do this in Excel?” here’s a whole universe of free APIs that you can tap into just by building the right URL. If ...

QR codes are akin to the kind of barcodes you see scanned at the checkout line in a store. Masahiro Hara, working for the Japanese company Denso Wave, invented QR codes in 1994. Tasked with ...