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WikiPedia: Internet http://www.businessdictionary.com/definition/inter... http://baobacgiang.com.vn/bg/khoa-hoc/164110/toc-d... https://www.digitalunite.com/technology-guides/usi... https://www.techopedia.com/definition/2419/interne... https://commons.wikimedia.org/wiki/Category:Intern...