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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. [5] [6] [7] 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; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

3. List of airline codes (Q) - Wikipedia

   en.wikipedia.org/wiki/List_of_airline_codes_(Q)

   This is a list of all airline codes. The table lists the IATA airline designators, ... QR QTR Qatar Airways: QATARI Qatar QAF Qatar Amiri Flight: AMIRI Qatar QB

4. ISO 3166-1 alpha-2 - Wikipedia

   en.wikipedia.org/wiki/ISO_3166-1_alpha-2

   ISO 3166-1 alpha-2 codes are two-letter country codes defined in ISO 3166-1, part of the ISO 3166 standard [1] published by the International Organization for Standardization (ISO), to represent countries, dependent territories, and special areas of geographical interest. They are the most widely used of the country codes published by ISO (the ...

5. Q code - Wikipedia

   en.wikipedia.org/wiki/Q_code

   The Q-code is a standardised collection of three-letter codes that each start with the letter "Q". It is an operating signal initially developed for commercial radiotelegraph communication and later adopted by other radio services, especially amateur radio. To distinguish the use of a Q-code transmitted as a question from the same Q-code ...

6. QR code payment - Wikipedia

   en.wikipedia.org/wiki/QR_code_payment

   A QR code payment is a mobile payment method where payment is performed by scanning a QR code from a mobile app. [1] This is an alternative to doing electronic funds transfer at point of sale using a payment terminal. [2] This avoids a lot of the infrastructure traditionally associated with electronic payments such as payment cards, payment ...

7. List of airline codes - Wikipedia

   en.wikipedia.org/wiki/List_of_airline_codes

   Download QR code; Wikidata item; Print/export Download as PDF; Printable version; ... This is a list of all airline codes. The table lists the IATA airline ...