2011-09-11 g.co 日記 g.coGoogle’s official URL shortcut just for Google websites. t.co http://www.prnewswire.com/news-releases/google-acquires-gco-to-launch-official-shortcut-for-google-products-and-services-500-startups-to-rebrand-web-address-from-500startupscom-to-500co-125766338.html