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  2. List of airline codes (R) - Wikipedia

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

    This is a list of all airline codes. The table lists the IATA airline designators , the ICAO airline designators and the airline call signs (telephony designator). Historical assignments are also included for completeness.

  3. Z code - Wikipedia

    en.wikipedia.org/wiki/Z_code

    There are at least three sets of Z codes. 1. One set of codes was originally developed by Cable & Wireless Ltd. (the Cable & Wireless Service Z code) for commercial communications in the early days of wire and radio communications. The old C&W Z codes are not widely used today. 2. APCO [clarification needed] also developed a system of Z codes. [1]

  4. YouTube - Wikipedia

    en.wikipedia.org/wiki/YouTube

    YouTube is an American online video sharing platform owned by Google. Accessible worldwide, [note 1] YouTube launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim, three former employees of PayPal. Headquartered in San Bruno, California, United States, it is the second most visited website in the world, after Google Search.

  5. Prewitt operator - Wikipedia

    en.wikipedia.org/wiki/Prewitt_operator

    The Prewitt operator is used in image processing, particularly within edge detection algorithms. Technically, it is a discrete differentiation operator, computing an approximation of the gradient of the image intensity function. At each point in the image, the result of the Prewitt operator is either the corresponding gradient vector or the ...

  6. Elvis operator - Wikipedia

    en.wikipedia.org/wiki/Elvis_operator

    In certain computer programming languages, the Elvis operator, often written ?:, is a binary operator that returns the evaluated first operand if that operand evaluates to a value likened to logically true (according to a language-dependent convention, in other words, a truthy value), and otherwise returns the evaluated second operand (in which case the first operand evaluated to a value ...

  7. Kirsch operator - Wikipedia

    en.wikipedia.org/wiki/Kirsch_operator

    The Kirsch operator or Kirsch compass kernel is a non-linear edge detector that finds the maximum edge strength in a few predetermined directions. It is named after the computer scientist Russell Kirsch .

  8. ISO 3166-1 - Wikipedia

    en.wikipedia.org/wiki/ISO_3166-1

    ISO 3166-1 ( Codes for the representation of names of countries and their subdivisions – Part 1: Country codes) is a standard defining codes for the names of countries, dependent territories, and special areas of geographical interest. It is the first part of the ISO 3166 standard published by the International Organization for Standardization .

  9. Mobile network codes in ITU region 2xx (Europe) - Wikipedia

    en.wikipedia.org/wiki/Mobile_network_codes_in...

    Used by resellers (e.g. Lowi - Vodafone's own low cost virtual operator, Lebara, Hits) 214: 07: Movistar: Telefónica Móviles España: Operational: GSM 900 / UMTS 900 / UMTS 2100 / LTE 800 / LTE 1800 / LTE 2100 / LTE 2600 / 5G 700 / 5G 1800 / 5G 2100 / 5G 3500 / 5G 26000