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The Cray XE6 "Hopper" is a supercomputer named after Grace Hopper, an American computer scientist and United States Navy rear admiral. Hopper was one of the first computer programmers, and she is credited with coining the term "bug" to describe a problem in a computer program. The Cray XE6 "Hopper" is a powerful supercomputer that is used for a variety of tasks, including weather forecasting, scientific research, and financial modeling.