What are QR Codes?

A QR code (abbreviated from Quick Response code) is a type of matrix barcode (or two-dimensional code) first designed for the automotive industry. More recently, the system has become popular outside of the industry due to its fast readability and large storage capacity. The code consists of black modules arranged in a square pattern on a white background. The information encoded can be made up of four standardized kinds ("modes") of data (numeric, alphanumeric, byte/binary, Kanji), or by supported extensions virtually any kind of data.

Created by Toyota subsidiary Denso Wave in 1994 to track vehicles during the manufacturing process, the QR code is one of the most popular types of two-dimensional barcodes. It was designed to allow its contents to be decoded at high speed. The technology has seen frequent use in the United States; QR usage is growing fast in Canada and Hong Kong.

Modern adoption is being seen by marketers using QR Codes to bridge offline media with online content in a fast, contextual manner.

Here's a list of articles related to QR Codes:
http://www.socialmediaexaminer.com/how-qr-codes-can-grow-your-business/
http://searchengineland.com/what-is-a-qr-code-and-why-do-you-need-one-27588
http://www.fastcompany.com/1585822/business-card-just-scan-my-qr-code
http://www.huffingtonpost.com/carol-roth/qr-codes-how-to-get-more-_b_117...