K

Website: kx.com

K is a proprietary array processing programming language developed by Arthur Whitney and commercialized by Kx Systems.

The language serves as the foundation for kdb+, an in-memory, column-based database, and other related financial products.

The language, originally developed in 1993, is a variant of APL and contains elements of Scheme.

Advocates of the language emphasize its speed, facility in handling arrays, and expressive syntax.