The first scientific hand-held calculators (HP-35) hit the markets with a hefty price tag at $395.
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The first volume of the Oxford English Dictionary was published.
King Carlos I of Portugal and his heir were assassinated in Lisbon.
Joe Biden and his wife, Jill, founded the 'Biden Foundation.'
The first reusable spacecraft called ''Space Shuttle Columbia" broke apart when returning to Earth, and all seven astronauts on board died.
An atomic bomb explosion was aired on TV for the first time.