QRc is based on a 2-D, space-saving optical code widely used in Japan. The code was originally intended for use in factories but quickly crossed into the consumer sector. With an enabled handset, a QR code -- which can appear on an ad, postcard, or almost anywhere else -- can be instantly interpreted to reveal its underlying message. QR contains 219 images.
You can use the QRc font to accurately encode the letters you type, or just use it to create fields of lovely, semi-random pixel texture!
The counterpart font, QR Type, is also a celebration of entropic pixelation, but the formations are alphabetic and human-readable.