Unable to get a response with the specified URL when scanning QR code - MIT App Inventor Help - MIT App Inventor Community
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![TIL that barcodes (UPCs specifically), invented in 1949 by Norman Woodland & Bernard Silver, are simply a set of lines broken into 7 unique spaces that represent 0-9, and identify a country TIL that barcodes (UPCs specifically), invented in 1949 by Norman Woodland & Bernard Silver, are simply a set of lines broken into 7 unique spaces that represent 0-9, and identify a country](https://external-preview.redd.it/3M2NQGzOWZt0DMEgPzf5rZBUbRa8HIgYhRv6aTwLoGs.jpg?auto=webp&s=8a45ef982f77bbaf6a3821d89682cf50a08dfc88)