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.

QR (quick response) codes have been around for nearly 30 years. Developed in 1994 by a Japanese engineer for the purpose of tracking components in car factories, they have evolved into a highly ...

Opinions expressed by Entrepreneur contributors are their own. We all use bar codes to buy things. Now small businesses may be able to use them to sell things. For pure techno hip factor, it’s tough ...