The Panhellenic Socialist Movement, better known as PASOK (Greek: Πανελλήνιο Σοσιαλιστικό Κίνημα, Panellī́nio Sosialistikó Kínīma, ΠΑ.ΣΟ.Κ), is a Greek centre-left political party. In 1981 PASOK formed the first socialist government in Greece's history, and subsequently ruled the country for most of the 1980s, 1990s and early 2000s. PASOK has served as the main opposition party since the general election of 2004. It is a member of the Party of European Socialists and the Socialist International. In the European Parliament it has 8 out of 24 Greek MEPs. On 31 January 2006, the party's president, George Papandreou, was elected President of the Socialist International, the worldwide organisation of social democratic, socialist and labour parties.