https://qooah.com/2012/04/30/lg-%e4%b9%9f%e4%be%86%e8%b7%9f%e9%a2%a8%ef%bc%8c%e6%8e%a8%e5%87%ba-beta-%e7%89%88-cloud-%e9%9b%b2%e7%ab%af%e6%9c%8d%e5%8b%99/