The state of the digital Covid vaccine card — the bar code that we store on our phones and present to businesses and venues as proof of inoculation — is […]
Bar Codes
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Back to news homeQR Codes Are Here to Stay. So Is the Tracking They Allow.
SAN FRANCISCO — When people enter Teeth, a bar in San Francisco’s Mission neighborhood, the bouncer gives them options. They can order food and drinks at the bar, he says, […]