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A '''QR code''' (quick response code) is a machine-readable code, know as a matrix barcode. It was invented by the Toyota subsidiary Denso Wave, in 1994. They can contain a wide variety of information, such as web URIs, payment information, wireless network connection information, and other unique identifiers (such as used by "[[Covid passport|vaccine passports]]"). They can be used in industrial applications for purposes such as product tracking, or consumer purposes, such as directing users to websites.<ref>https://www.kaspersky.com/resource-center/definitions/what-is-a-qr-code-how-to-scan</ref>
A '''QR code''' (quick response code) is a machine-readable code, know as a matrix barcode. It was invented by the Toyota subsidiary Denso Wave, in 1994. They can contain a wide variety of information, such as web URIs, payment information, wireless network connection information, and other unique identifiers (such as used by "[[Covid passport|vaccine passports]]"). They can be used in industrial applications for purposes such as product tracking, or consumer purposes, such as directing users to websites.<ref>https://www.kaspersky.com/resource-center/definitions/what-is-a-qr-code-how-to-scan</ref>
==References==
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[[Category:Technology]]
[[Category:Technology]]