A very vaguely related thing that might be useful to someone: in QR codes, using ALL-CAPS actually saves you data, making the QR code less "dense" and so easier

A very vaguely related thing that might be useful to someone: in QR codes, using ALL-CAPS actually saves you data, making the QR code less "dense" and so easier to read at smaller sizes. The trick is in the "alphanumeric" encoding mode of the QrR standard, which lets you encode 3 character per 11 bit (as opposed to 1 character per 8 bits) if you limit yourself to just numbers, uppercase letters and a few common URL symbols [0]. Besides making the code less dense, you can also add more error correction at the same density, making the code more resilient to wear, damage and reflections. For more QR code trivia, see this excellent demo: https://www.nayuki.io/page/creating-a-qr-code-step-by-step https://www.nayuki.io/page/creating-a-qr-code-step-by-step [0] https://www.thonky.com/qr-code-tutorial/alphanumeric-table https://www.thonky.com/qr-code-tutorial/alphanumeric-table