What Are QR Codes?

Even before millions watched a QR code bounce across the screen during the Super Bowl, the plucky code scratched back into our lives. 

8 Ways to Use QR Codes in Higher Education Classrooms

What are QR Codes, and How Were They Invented? - History-Computer

Quick Response (QR) Code: Definition and How QR Codes Work

How to Perfect QR Code Quality

QR Codes – Easy Digital Downloads Documentation

How to create a QR code + best practices

QR Code, 2D, matrix & scanning

Merchant-Presented QR Codes, Explained

Create SMS QR Codes with Twilio

The Art of QR Codes - The Social Media Hat

Actually, QR Codes Never Went Away - The New York Times

QR code - Wikipedia