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"The idea was to have a system that would read steps to them under their control, so they could keep their hands and eyes on whatever task they were doing," says Beth Ann Hockey, a computer scientist who leads the project at NASA's Ames Research Center in Moffett Field, California, US.
That capability "will be like having another crew member aboard", says Fincke.
There's some clever voice recognition software in software in use designed to help distinguish between commands and general conversation and to also allow users to correct Clarissa when she misinterprets a command.