John Watrous may refer to:
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John Charles Watrous (1801–1874), United States federal judge
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John S. Watrous (died 1897), politician from the Minnesota territory
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John Watrous (computer scientist)
John Harrison Watrous is the Technical Director of IBM Quantum Education at IBM and was a professor of computer science at the David R. Cheriton School of Computer Science at the University of Waterloo, a member of the Institute for Quantum Comp ...
, computer scientist at the University of Waterloo
{{hndis, Watrous, John