World currency pound sterling. The transition between pound sterling and United States dollar and its impact for central banks was described recently. In the period following the Bretton Woods Conference of 1944, exchange rates around the world were pegged to the United States dollar, which could be exchanged for a fixed amount of gold. This reinforced the dominance of the US dollar as a global currency. Since the collapse of the fixed exchange rate regime and the gold standard and the institution of floating exchange rates following the Smithsonian Agreement in 1971, most currencies around the world have no longer been pegged
S-train expansion and new trains). Plans for further extension of system include another two lines, one of which should reach Belgrade Nikola Tesla Airport. "S-Bahn" is also used in German-speaking Switzerland. While French publications of those networks translate it as "RER", the line numbers are still prefixed with an S (e.g. S2). The oldest network in Switzerland is the Bern S-Bahn, established in stages from 1974 and has adopted the term S-Bahn since 1995. It is also the only one in Switzerland to use a coloured "S" logo. In 1990, the Zürich S-Bahn, which covers the largest area, went into service.