k is a vector-oriented language designed by Arthur Whitney that values conciseness and speed of execution. It has multiple slightly incompatible versions like k4 and k5, with the bleeding-edge k being developed by Shakti (k9). Each generation of k sacrifices backward compatibility for better performance and design. The main commercial version is q/kdb+ by kX systems. K excels in data wrangling and analytics, driven by financial industry use. It has an open-source community with various implementations like ngn/k and oK. The language is known for its terse code and a focus on simplicity. Expertise in k can lead to computational superpowers and a unique perspective on data.
https://xpqz.github.io/kbook/Introduction.html