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Elsie Shutt founded one of the first software businesses in the U.S. in 1958. And the programmers were all women. Courtesy Elsie Shutt hide caption
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Screen shot of the mobile game Candy Crush Saga. Screen shot of Candy Crush Saga hide caption
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Union soldiers found that gunpowder was sometimes mixed with sawdust. Mathew B. Brady/AP hide caption
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Medical workers in Monrovia, Liberia, put on their protective suits before treating Ebola patients Dominique Faget/AFP/Getty Images hide caption
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