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Seokchan "Channy" Yun (; born January 19, 1973) is a South Korean technologist. He promotes Web standards for Web interoperability in South Korea, with a particular focus on encouraging adoption of Firefox. He was an invited expert in W3C and contributed Web standards such as HTML5 and Web cryptography API. He also founded WebStandards Korea as a member of the International Liaison Group of Web Standards Project which is an active advocate for Web standards and best practices either in their country of origin or domicile.