Robert Berriedale Keith Dewar (21 June 1945 – 30 June 2015) was an American computer scientist and educator. He helped to develop programming languages and compilers and was an outspoken advocate of freely licensed open-source software. He was a cofounder, CEO, and president of the AdaCore software company. He was also an enthusiastic amateur performer and musician, especially with the Village Light Opera Group in New York City.
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