Apparently, the software program I mentioned at the start of this post lets users select up to 15 content-relevant categories in which to include your website.

显然，软件程序我在这篇文章开始提到让用户选择多达15个内容相关的类别，其中包括您的网站。

youdao

The Domain Name System (DNS) is the program for computers to understand website addresses such as Google.com, turn them into IP address and get the relevant content for the website.

FORBES: Google, OpenDNS And CDNs 'Speedup' The Internet