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  2. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_Code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [6] [7] [8] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [9] the pattern of the position detection markers was determined by finding the least-used sequence of ...

  3. Square (financial services) - Wikipedia

    en.wikipedia.org/wiki/Square_(financial_services)

    Square charges $99 for Square Stand and $59 for its chip-based Square Reader. [54] The Square app is freely downloadable from the Apple App Store and the Google Play Store. Square charges a fee of 2.6% plus $0.10 on every electronically scanned credit card transaction [55] or 3.50% plus $0.15 per manually-entered transaction. No monthly or set ...

  4. Uniform Resource Identifier - Wikipedia

    en.wikipedia.org/wiki/Uniform_Resource_Identifier

    URL is a useful but informal concept: a URL is a type of URI that identifies a resource via a representation of its primary access mechanism (e.g., its network "location"), rather than by some other attributes it may have. [19] As such, a URL is simply a URI that happens to point to a resource over a network.

  5. QR Codes Are Reshaping Public Transit, But Are They Safe? - AOL

    www.aol.com/qr-codes-reshaping-public-transit...

    "Because QR codes can sometimes be a little easy to fake, these apps now have the ability to have a kind of dancing QR code that can only be read by the by the train engineer's readers.

  6. Wikipedia:WikiProject QRpedia/user guide - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:WikiProject...

    If possible, providing free Wi-Fi hotspots will facilitate more use of the codes, especially in remote or thick-walled buildings with unreliable mobile internet connections. Display the codes where people (including children, and those in wheelchairs) can reach them. The codes should be well lit. Shadow makes it more difficult to scan.

  7. Block, Inc. - Wikipedia

    en.wikipedia.org/wiki/Block,_Inc.

    Block, Inc. (formerly Square, Inc. [10]) is an American technology company that provides financial services to consumers and merchants. [ 11 ] [ 12 ] [ 13 ] Founded in 2009 by Jack Dorsey , it is the U.S. market leader in point-of-sale systems.

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