2009-07-08 Google Chrome OS http://internet.watch.impress.co.jp/docs/news/20090708_300679.html http://itpro.nikkeibp.co.jp/article/NEWS/20090708/333366/ http://journal.mycom.co.jp/news/2009/07/08/030/ http://www.itmedia.co.jp/news/articles/0907/08/news037.html