Facebook F8 Facebook F8 Facebook F8 (pronounced ""eff eight"") is a mostly-annual conference held by Facebook, intended for developers and entrepreneurs who build products and services around the website. It is hosted in the San Francisco Bay Area, California, previously in San Francisco (until 2016) and now in San Jose, in Silicon Valley. Previous events have started with a keynote speech by Facebook founder Mark Zuckerberg, followed by various breakout sessions concentrating on specific topics. Facebook has often introduced new features, and made new announcements, at the conference. The "F8" name comes from Facebook's tradition of 8 hour hackathons. The scheduling of
S-train tunnel under the central station and the city centre. The high number of large cities in the Ruhr area promotes a polycentric network connecting all cities and suburbs. The "S-Bahn Rhein-Ruhr", as it is called, features few tunnels, and its routes are longer than those of other networks. The Ruhr S-Bahn is the only S-Bahn network to be run by more than one corporation in Germany, and the Salzburg S-Bahn holds a similar distinction in Austria. Most Swiss S-Bahn systems are multi-corporation networks, however. Most German S-Bahn networks have a unique ticket system, separated from the "Deutsche Bahn" rates, instead