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World Metrology Day is an annual celebration of the signature of the Metre Convention on 20 May 1875 by representatives of seventeen nations.
Celebrated every 10 November, World Science Day for Peace and Development highlights the significant role of science in society and the need to engage the wider public in debates on emerging scientific issues. It also underlines the importance and relevance of science in our daily lives.
World Standards Day is celebrated around the world every year on October 14. This date was specifically chosen to mark the date, in 1946, when delegates from 25 countries first gathered in London and decided to create an international organization (ISO) focused on facilitating standardization.
On August 15, 1877, while discussing the prospects for the telephone use in correspondence with the president of the Pittsburgh Telegraph Company, Thomas Edison suggested using "Hello" as a telephone greeting.
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