Correction: A previous version of this story did not make it clear that 1App, and not Starbucks, ran the QR code test. The InstantScan service from 1App attempts to provide a solution for marketers ...

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.

Are they black-and-white bathroom tiles? Newfangled bar codes? Postage stamps honoring artist M.C. Escher? Thanks to increasingly prevalent smartphones, many marketers and organizations are convinced ...

Among the many changes brought about by the pandemic is the widespread use of QR codes, graphical representations of digital data that can be printed and later scanned by a smartphone or other device.