Is it a printing error? A pixilated maze? One of those puzzles where you have to cross your eyes to see the hidden image? Two-dimensional matrix bar codes are expanding into the mainstream. You can ...

QR codes, originally developed as two-dimensional matrix barcodes for rapid data acquisition, have undergone significant transformation and expansion in application. Their evolution from simple ...

QR code, short for Quick Response Code, is a kind of matrix barcode that includes information about a product or service. You can find it being used for advertising purposes, where brands put up ...

A QR code is a machine-readable matrix barcode and it stands for “quick response” code. You can use the camera app on any phone to scan a QR code. After being scanned, the QR code will send the user ...

QR codes, which had begun a fall into obscurity, have come roaring back. Many restaurants sport these matrix barcodes on tables as replacements for menus. One even appeared in an ad for cryptocurrency ...

Faith writes guides, how-tos, and roundups on the latest Android games and apps for Android Police. You'll find her writing about the newest free-to-play game to hit Android or discussing her paranoia ...