Square, black and white codes are popping up all over on products, in magazines, on buildings and business cards.

On his way home to Washington recently from a business trip, Don Alberstadt, a quality assurance auditor, stood in line at the US Airways ticket counter in San Diego for 45 minutes, waiting to chec… ...

Once decoding applications become common, there could be a number of practical uses for QR codes, such as printing contact information on visiting cards, brochures and printed ads as QR code ...