Rails Application Deployed by... IBM
CNN: The NMAAHC is the first museum website to partake fully of the Web 2.0 social computing revolution. The site is based on cutting-edge, open source programming frameworks such as Ruby on Rails for collaborative website development. It employs concepts such as tags, or keywords, created by the users to help organize the content. As a result, the Museum on the Web is an example of the bottoms-up web, meaning it’s both a product of a site visitor’s participation, and an enabler of creating a community for them. The site runs on IBM System X web and database servers.
Emphasis added.