1. [n]  (Taoism) the ultimate principle of the universe
2. [n]  an adherent of any branch of Taoism

Lisp dialect with concurrency, object-orientation and logic. "Concurrent Programming in TAO - Practice and Experience", I. Takeuchi in Parallel Lisp: Languages and Systems, T. Ito et al eds, LNCS 441, Springer 1989, pp.271-299.