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Ada Lovelace is widely recognized as the world's first computer programmer, and as writing the world's first computer program. In 1842-1843 she translated an Italian work on Charles Babbage's Analytical Engine design for a general-purpose computer. in the translation, Lovelace included her own set of notes (longer than the original work), which detail how to correctly calculate a sequence of Bernoulli numbers with the Engine, had it ever been built. She also correctly predicted that computers in the future would have abilities beyond just number calculation, which many in the field, including Babbage, discounted.
The computer language Ada created by the United States Department of Defense is named after her, and March 24th has been commemorate as Ada Lovelace Day, to recognize women's achievements in technology and science.