What would be the “7 wonders of internet"?

Hello Guys,

If a list of "7 wonders of internet" is to be made what are things being included in the list?
In my point of view these are the things that maybe included in the "7 wonders of internet". This is not in any particular order.

1. Google
2. Facebook
3. YouTube
4. Instagram
5. LinkedIn
6. Twitter
7. Amazon

Guys, tell me your list of "7 wonders of internet."