k: super terse language inspired by APL and lisp q: slightly less-terse language written in k, with similar semantics. The vendor (kx) supports q, not k kdb+:

k: super terse language inspired by APL and lisp q: slightly less-terse language written in k, with similar semantics. The vendor (kx) supports q, not k kdb+: column-oriented database bundled with q