Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

and most QR tags contain the URL of a Web page that promotes merchandise or a service. See QR code. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

NORFOLK, Va. - Quick Response (QR) codes are everywhere these days because they're an easy, contactless way to read a menu or download an app. While square barcodes can be convenient, they can ...

William Arruda covers personal branding, leadership, and careers. QR codes seemed to pop on the scene and disappeared almost as quickly as they arrived. After resurging and then waning again ...