Three Ring for the Elven-kings under the sky.

[Niluial]

I know a little about the rings and the powers they give. But I found this:

“Three Rings for the Elven-kings under the sky
Seven for the Dwarf-lords in their Halls of stone,
Nine for Mortal Men doomed to die,
One for the Dark Lord on his dark throne
In the Land of Mordor where the Shadows lie.
One Ring to Rule them all,
One Ring to bring them all and in the darkness bind them
In the Land of Mordor where the Shadows lie.”

But then again everyone probably has that in their book. I probably sound dumb already so I am going to ask a dumb question. Ok so there are many rings, how many. And the ring in the Lord of the Rings, I would take it that that is “One Ring to rule them all”??