https://en.wikipedia.org/wiki/Q_(programming_language_from_Kx_Systems)
Q (programming language from Kx Systems) - Wikipedia Q is a proprietary array processing language developed by Arthur Whitney and commercialized by Kx Systems. The language serves as the query language for kdb+, a disk based and in-memory, column-based database. kdb+ is based upon K, a terse variant of APL. Q is a thin wrapper around K, providing a mo...