QR (Quick Response) codes are square grids of black and white pixels, which provide links to useful online information. Like traditional barcodes, each one contains unique data that can only be deciphered with a dedicated scanning tool. Since they were launched in 1994, QR codes have appeared on product packaging, posters, event tickets and more, but the coronavirus pandemic has given them new purposes. Many businesses, including coffee shops, restaurants and hairdressers, now ask you to scan an NHS QR code for test and trace reasons . You may also need to scan a code to view a venue's menu, access its website or download its mobile app to place your order. Here we explain the best ways to deal with these codes. Many smartphones and tablets let you scan QR codes using their camera apps, which saves you the bother of installing and opening a separate tool.
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