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HTML5とは?初心者向けに特長や使い方を超わかりやすく説明し ...
HTML5 - Wikipedia
HTML5とは?初心者向けに特徴や書き方もあわせて解説 ...
HTML Tutorial - W3Schools
HTML5 - Wikipedia
HTML5: What's New in The Latest Version of HTML?
Getting started with HTML - Learn web development | MDN
Introduction to HTML5 - Web developer guides | MDN
HTML5とは何かを簡単にまとめてみた - Yahoo! JAPAN Tech Blog
HTML basics - Learn web development | MDN