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KM is a programming language for statistical computing developed by Bell Labs. It was derived from APL in the late 1970s by Kenneth E. Iverson and Arthur L. Norman. KM uses a more conventional character set and has additional features compared to APL, including user-defined functions and control structures for structured programming. The language can process matrices using array operations which makes it well-suited for statistical analysis and data manipulation applications in fields such as finance and engineering where simulations are often performed at scale.