How to Make QR Codes on iPhone or iPad. Barcodes—or in this case, QR codes—consist of basic black and white patterns that, ...

BarcodeAPI.org is an open source barcode server capable of generating a wide range of barcodes over a RESTful HTTP server.

But what’s also striking about the order is how it seeks to dictate some arcane details of the way voting systems work in some of America: Specifically, it bans the machine-readable barcodes or QR ...