The codes are designed to hold a relatively large amount of data in a small space — just under three kilobytes of binary data, or more than 4,000 letters and numbers.

Two-dimensional matrix bar codes are expanding into the mainstream. You can find them in magazine and newspaper ads and in stores including Best Buy, Lowe's, Gap and Macy's. They're even showing ...

PTI Updated On Jan 28, 2023 at 08:00 AM IST ...

Hara invented the QR code in 1994 to track car parts while he was working for a Japanese company. It was developed as an alternative to the barcode system.