Facebook is a social network of the American company Facebook, Inc. (1601 S. California Ave, Palo Alto, CA 94304, USA). Twitter is a microblogging service of the American company Twitter, Inc. (795 Folsom St., Suite 600, San Francisco, CA 94107). Google+ is a social network of Google. LinkedIn is a social network of LinkedIn Corporation, 2029 Stierlin Court, Mountain View, CA 94043, USA. When visitors call up the Provider.ch website, their browser establishes a direct connection with the servers of the aforementioned providers and loads the respective button from there. The information is transmitted to the respective provider that the corresponding website has been accessed. If the visitor is a registered user of the relevant service and the provider can also assign the page request to the corresponding profile and possibly collect further data. Further information on data collection and processing can be found in the data protection declarations of the respective providers, which are available at [Examples: www.facebook.com, www.twitter.com, https://plus.google.com and www.linkedin.com].