Software built into the cameras on iPhones and Android phones makes quick work of decoding QR codes. How do you do that on a laptop or desktop computer? I have a friend who calls me occasionally to ...

Web-based QR code scanners are another handy option for scanning codes with a laptop camera. Just visit a website that ...

Anatomy of a QR code While it is easy for people to read Arabic numerals, it is hard for a computer. Bar codes encode alphanumeric data as a series of black and white lines of various widths. At the ...

Add Yahoo as a preferred source to see more of our stories on Google. QR codes are visual patterns that store data smartphones can read. AP Photo/Vincent Yu Among the many changes brought about by the ...