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 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 ...

Get unlimited access to ad-free articles and exclusive content. QR codes, those little black-and-white puzzle-like square matrixes that increasingly populate ads and promotional posters, are meant to ...

PORT TOWNSEND ­ ­– The use of QR codes, matrix bar codes that hold information about a product or a store, is emerging in Port Townsend in two different venues this week. The QR — or “quick response” ...

The Covid-19 pandemic has drastically changed the way humans interact with each other and their surroundings. Physical health has become one of the top — if not the top — concerns of consumers ...