QR code

File Format
Name	QR code
Ontology	Physical File Formats Bar codes QR code
Released	1994
QR code that goes to File Format Wiki

QR codes (Quick Response) are a type of 2-dimensional bar code which is currently very popular. Originally designed for industrial use in tracking items as they move around a warehouse or factory, they are currently mainly used to provide hyperlinks in ads, articles, and signs which somebody with an appropriate reader (such as apps for a smartphone) can use to retrieve what is generally a URL linking into the Web, though other kinds of content can also be stored.

Software

• Review of barcode scanner apps
• Android app to read UPC and QR codes to look up product info/prices and other info coded or linked in bar codes
• Bar Code app (iOS)

Developer libraries

• ZBar bar code reader library: cross-platform
• zxing (Zebra Crossing) (barcode library for Java, ported to some other systems)

Utilities

• QR code generator
• Online barcode generator (supports many different formats)

References

• QR code (Wikipedia)
• Official QR site
• Reed Solomon Codes for Coders - Wikiversity tutorial
• Barcode contents
• WTF QR Codes
• Google Glass hacked by a simple QR code