- Bartolomeo Cristofori di Francesco (Italian pronunciation: [bartoloˈmɛːo kriˈstɔːfori di franˈtʃesko]; May 4, 1655 – January 27, 1731) was an Italian maker of musical instruments famous for inventing the piano.
- The Open Graph protocol (ogp.me)
The Open Graph protocol enables any web page to become a rich object in a social graph. For instance, this is used on Facebook to allow any web page to have the same functionality as any other object on Facebook.