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2. WhatsApp - Wikipedia

   en.wikipedia.org/wiki/WhatsApp

   Download QR code; Print/export Download as PDF; Printable version; In other projects Wikimedia Commons; ... WhatsApp was changed from a free service to a paid one. In ...

3. 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 ...

4. Timeline of WhatsApp - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_WhatsApp

   Download QR code; Print/export ... WhatsApp 2.0 is released on the App Store for the iPhone. [3] 2009: October: ... WhatsApp goes free, with an annual subscription ...

5. Use WhatsApp to verify your AOL account

   help.aol.com/articles/use-whatsapp-to-verify...

   Typos happen. Try entering your phone number again, and verify it's the correct number and matches the phone number you use for WhatsApp. Check your WhatsApp account phone number. If you have a registered and active WhatsApp account, make sure the phone number you provided matches the phone number listed in your WhatsApp account profile.

6. File:WhatsApp.svg - Wikipedia

   en.wikipedia.org/wiki/File:WhatsApp.svg

   Download QR code; In other projects Appearance. move to sidebar hide ... (UTC) Colour in previous version does not match the WhatsApp brand guidelines as provided. 12 ...

7. Contactless dining - Wikipedia

   en.wikipedia.org/wiki/Contactless_dining

   Contactless dining systems can convert paper menus into QR code menus and also manage waitlists, as well as provide other services to restaurants. [ citation needed ] By speeding up the payment process, contactless payments allows for shorter meal durations and additional guests to be seated during busy periods.