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Once, it was just a term in sonar, for a pulse of sound. Later became well-known in computer networks as a command to check for reachability of a host machine. This became responsible for an informal social term to contact a person. What term, which is the latest addition to the world of social networks?

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In Jan 2017, Finland became the first country in Europe to officially experiment with this socio-economic concept. Similar experiments are scheduled for many Dutch cities and the Canadian city of Ontario in 2017. In the case of Finland, the figure is 560 Euros a month. What concept?

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