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Airbus Link
https://airbus-aero.blogspot.com/p/https%3A%2F%2Fkasworld-aero.blogspot.com%2F2018%2F11%2Fpassenger-address-system-description.html
Boeing Link
https://boeing-aero.blogspot.com/p/https%3A%2F%2Fkasworld-aero.blogspot.com%2F2018%2F11%2Fpassenger-address-system-description.html