Facebook F8 Q&A. Some of the details of the topics were: F8 2014 was announced on March 8, 2014 by Facebook representative Ilya Sukhar that the F8 event would return on April 30. The conference was focused on Facebook's strategy to become a 'cross-platform platform'. Here is a list of the main topics: The 2015 F8 conference was held on March 25, 2015 at the Fort Mason Center. The 2016 F8 conference was held on April 12 and 13, 2016. Announcements: Facebook Analytics adds push and in app notifications feature The 2017 F8 conference was held from April 18, 2017 to April
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