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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. 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; the pattern of position detection was found and determined by applying the least-used ratio (1:1:3:1:1) in black ...

  3. 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 ...

  4. List of airline codes - Wikipedia

    en.wikipedia.org/wiki/List_of_airline_codes

    Former IATA code: QA; former ICAO code: AEK; former callsign: AFRICAN EXPRESS AK AXM AirAsia: RED CAP Malaysia ICAO code no longer allocated D7 XAX AirAsia X: XANADU Malaysia DJ WAJ AirAsia Japan: WING ASIA Japan defunct I5 IAD AirAsia India: ARIYA India Founded 28. Mar 2013: AXN Alexandair: ALEXANDROS Greece defunct AXP Aeromax: AEROMAX SPAIN ...

  5. Grammarly - Wikipedia

    en.wikipedia.org/wiki/Grammarly

    Grammarly is a Ukraine -founded [4] [5] [6] cloud -based [7] typing assistant, headquartered in San Francisco. [6] [8] [9] It reviews spelling, grammar, punctuation, clarity, engagement, and delivery mistakes in English texts, detects plagiarism, and suggests replacements for the identified errors. [10] It also allows users to customize their ...

  6. Coupon - Wikipedia

    en.wikipedia.org/wiki/Coupon

    Coupon. In marketing, a coupon is a ticket or document that can be redeemed for a financial discount or rebate when purchasing a product . Customarily, coupons are issued by manufacturers of consumer packaged goods [1] or by retailers, to be used in retail stores as a part of sales promotions. They are often widely distributed through mail ...

  7. List of Unicode characters - Wikipedia

    en.wikipedia.org/wiki/List_of_Unicode_characters

    1 Control-C has typically been used as a "break" or "interrupt" key. 2 Control-D has been used to signal "end of file" for text typed in at the terminal on Unix / Linux systems. Windows, DOS, and older minicomputers used Control-Z for this purpose. 3 Control-G is an artifact of the days when teletypes were in use.