(FILES) In this file photo taken on November 20, 2014 Jack Dorsey, CEO of Square, Chairman of Twitter and a founder of both ,holds an event in London where he announced the launch of Square Register mobile application. The app, which is available on Apple and Android devises, will allow merchants to track sales, inventories and other data on smartphones and tablets. Jack Dorsey, co-founder of Twitter and founder of Square Inc.  said on April 7, 2020 that he was donating more than a quarter of his wealth for COVID-19 relief efforts. / AFP / Justin TALLIS
Jack Dorsey, founder of Twitter and Square, said on April 7 that he would donate more than a quarter of his wealth for Covid-19 relief efforts. Photo: AFP

Billionaires: Twitter's Jack Dorsey pledges $1bn of his Square stake for virus relief


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