the interpreter does not know the message until they hear it. Simultaneous interpretation using electronic equipment where the interpreter can hear the speaker's voice as well as the interpreter's own voice was introduced at the Nuremberg trials in 1945. The equipment facilitated large numbers of listeners, and interpretation was offered in French, Russian, German and English. The technology arose in the 1920s and 1930s when American businessman Edward Filene and British engineer Alan Gordon Finlay developed simultaneous interpretation equipment with IBM. Yvonne Kapp attended a conference with simultaneous interpretation in 1935 in the Soviet Union. As it proved successful, IBM was able to sell the equipment to the United Nations, where it is now widely used in the United Nations Interpretation Service. In the ideal setting for oral language, the interpreter sits in a sound-proof booth and speaks into a microphone, while clearly seeing and hearing the source-language speaker via earphones. The simultaneous interpretation is rendered to the target-language listeners via their earphones. The progressive shift from consecutive to simultaneous Pavel Palazchenko's My Years with Gorbachev and Shevardnadze: The Memoir of a Soviet Interpreter gives a short history of modern interpretation and of the transition from its consecutive to simultaneous forms. He explains that during the nineteenth century interpreters were rarely needed during European diplomatic discussions; these were routinely conducted in French, and all government diplomats were required to be fluent in this language. Most European government leaders and heads of state could also speak French. Historian Harold Nicolson attributes the growing need for interpretation after World War I to the fact that U.S. President Woodrow Wilson and British Prime Minister David Lloyd George "were no linguists". At the time, the concept and special equipment needed for simultaneous interpretation, later patented by Alan Gordon Finlay, had not been developed, so consecutive interpretation was used. Consecutive interpreters, in order be accurate, used a specialized system of note-taking which included symbols abbreviations and acronyms. Because they waited until the speaker was finished to provide interpretation, the interpreters then had the difficult task of creating from these notes as much as half an hour of free-flowing sentences closely matching the speaker's meaning. Palazchenko cites , Jean Herbert and the Kaminker brothers as skilled interpreters, and notes one unusual case in which André Kaminker interpreted a speech by a French diplomat who spoke for two and a half hours without stopping. After World War