Interesting To Some, But Probably Not Very

Like a few in the comments though, I call BS. There's no way this is exhaustive.

The 10 Biggest Databases in the World.

Sample? Sure:

It is estimated that the text portion of the Library of Congress would comprise 20 terabytes of data. The LC expands at a rate of 10,000 items per day and takes up close to 530 miles of shelf space...

The Library of Congress is number 10 on their list.