1989 was a turning point in political history with the "Revolutions of 1989" which ended communism in Eastern Bloc of Europe, starting in Poland and Hungary, with experiments in power-sharing coming to a head with the opening of the Berlin Wall in November, the Velvet Revolution in Czechoslovakia and the overthrow of the communist dictatorship in Romania in December; the movement ended in December 1991 with the dissolution of the Soviet Union. Revolutions against communist governments in Eastern Europe mainly succeeded, but the year also saw the suppression by the Chinese government of the 1989 Tiananmen Square protests in Beijing.
It was the year of the first Brazilian presidential election in 29 years, since the end of the military government in 1985 that ruled the country for more than twenty years, and marked the redemocratization process's final point.
F. W. de Klerk was elected as State President of South Africa, and his regime gradually dismantled the apartheid system over the next five years, culminating with the 1994 election that brought jailed African National Congress leader Nelson Mandela to power.
The first commercial Internet service providers surfaced in this year, as well as the first written proposal for the World Wide Web and New Zealand, Japan and Australia's first Internet connections. The first babies born after preimplantation genetic diagnosis were conceived in late 1989.
January 1 – The New York Times discloses involvement of West German company Imhausen and Salzgitter AG in building a chemical weapon plant in Rabta, Libya.
January 2 – Prime Minister Ranasinghe Premadasa takes office as the third President of Sri Lanka.
January 4 – Gulf of Sidra incident (1989): Two Libyan MiG-23 "Floggers" are engaged and shot down by two US Navy F-14 Tomcats.
January 7 – Emperor Shōwa dies; his son Akihito is enthroned as the 125th Emperor of Japan immediately, followed by the change in the era name from Shōwa to Heisei on the following day.
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Ce cours donne une introduction au traitement mathématique de la théorie de l'inférence statistique en utilisant la notion de vraisemblance comme un thème central.
Important events of 1990 include the Reunification of Germany and the unification of Yemen, the formal beginning of the Human Genome Project (finished in 2003), the launch of the Hubble Space Telescope, the separation of Namibia from South Africa, and the Baltic states declaring independence from the Soviet Union amidst Perestroika. Yugoslavia's communist regime collapses amidst increasing internal tensions and multiparty elections held within its constituent republics result in separatist governments being elected in most of the republics marking the beginning of the breakup of Yugoslavia.
1988 was a crucial year in the early history of the Internet—it was the year of the first well-known computer virus, the 1988 Internet worm. The first permanent intercontinental Internet link was made between the United States (NSFNET) and Europe (Nordunet) as well as the first Internet-based chat protocol, Internet Relay Chat. The concept of the World Wide Web was first discussed at CERN in 1988. The Soviet Union began its major deconstructing towards a mixed economy at the beginning of 1988 and began its gradual dissolution.
It was the final year of the Cold War, which had begun in 1947. During the year, the Soviet Union collapsed, leaving fifteen sovereign republics and the CIS in its place. In July 1991, India abandoned its policies of dirigism, license raj and autarky and began extensive liberalisation to its economy. This increased GDP but also increased income inequality over the next two decades. A UN-authorized coalition force from 34 nations fought against Iraq, which had invaded and annexed Kuwait in the previous year, 1990.