Arthur Whitney
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Arthur Whitney is a computer scientist most notable for developing the APL-inspired programming languages A+ and K. He also wrote the initial prototype of J, a terse and macro-heavy single page of code in one afternoon, which then served as the model for J implementor Roger Hui.
K is a proprietary array programming language designed for financial analysis.
He studied at the University of Toronto and Stanford and is the CEO and co-founder of Kx Systems.
