QR, which stands for Quick Response, is an ingenious and remarkable technology. It's a type of matrix barcode capable of storing large amounts of information in a compact, scannable format. These small squares can encapsulate everything from a straightforward URL to an entire vCard contact. Initially developed for the Japanese automotive industry, they have become ubiquitous, acting as tiny portals bridging the physical world to the digital one. What sets them apart is their ability to be quickly scanned from any angle, a significant improvement over the older linear barcodes. Moreover, QR codes include an error correction function, ensuring they can still be accurately read even if partially damaged or obscured.