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.

Apple Inc., whose Apple Pay is the leading mobile-payment service based on near field communication technology, reportedly is testing Quick Response codes as an alternative technology with Apple Pay.

WhatsApp is testing a new feature that should make it easier to add people to your contact list using QR codes, reports WABetaInfo. The report notes that the feature was spotted in a test version of ...