https://qooah.com/2015/12/31/%e6%af%94%e4%b8%ad%e5%9c%8b%e6%9b%b4%e5%bc%b7-%e5%8c%97%e9%9f%93%e6%8e%a8%e5%87%ba%e8%87%aa%e5%ae%b6%e9%96%8b%e7%99%bc%e7%9a%84%e9%9b%bb%e8%85%a6%e7%b3%bb%e7%b5%b1%e3%80%8c%e7%b4%85%e6%98%9f-os/