K (programming language)
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K is a high level array programming language developed by Arthur Whitney, a very influential member of the APL community.
K is a successor of the Morgan Stanley financial language A+, also created by Whitney. From 1994 to 1997 the Union Bank of Switzerland purchased exclusive rights for the use of K, but now it is generally available.
K is an exceptional language for dealing with mathematical analysis, financial prediction, and large volumes of spreadsheet-like data.