Swiss Federal Railways (German: Schweizerische Bundesbahnen, SBB; French: Chemins de fer fédéraux suisses, CFF; Italian: Ferrovie federali svizzere, FFS) is the national railway company of Switzerland. It is usually referred to by the initials of its German, French, and Italian names, either as SBB CFF FFS, or used separately. The Romansh version of its name, Viafiers federalas svizras, is not officially used. The official English abbreviation is "SBB", instead of the English acronym such as "SFR", which stands for Swiss Federal Railways itself. The company, founded in 1902, is headquartered in Bern. It used to be a government institution, but since 1999 it has been a special stock corporation whose shares are held by the Swiss Confederation and the Swiss cantons. It is currently the largest rail and transport company of Switzerland, and operates on most standard gauge lines of the Swiss network. It also heavily collaborates with most other transport companies of the country, such as the BLS, one of its main competitors, to provide fully integrated timetables with cyclic schedules. SBB was ranked first among national European rail systems in the 2017 European Railway Performance Index for its intensity of use, quality of service, and safety rating. While many rail operators in continental Europe have emphasised the building of high-speed rail, SBB has invested in the reliability and quality of service of its conventional rail network, on both national and regional scales. In addition to passenger rail, SBB operates cargo and freight rail service, through its subsidiary SBB Cargo, and has large real estate holdings in Switzerland.