In 1922 – The BBC sent its first daily transmission from station 2LO at Marconi House London. Arthur Burrows, first Director of Programmes, read the first newscast.
In 1971 – The American space probe Mariner 9 began orbiting Mars becoming the first spacecraft to successfully orbit another planet.
In 2007 – The last Direct Current electrical distribution system in the US was shut down by Con Edison in New York.
Like Tech History? Purchase Tom Merritt’s Chronology of Tech History at Merritt’s Books site.