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

Designed as a high-tech marketing resource, QR (quick response) codes have many useful applications. These (usually) black-and-white algorithmic codes are gateways to a potential multimedia nirvana.

The design of QR codes also make them well suited to 3D printing, and thanks to a new ... Incidentally, this is an excellent example of where STL leaves something to be desired.