Lisp with a parallel data structure, the ' xapping' , an array of values assigned to an array of sites. [G.L. Steele et al, "Connection machine LISP: Fine-Grained Parallel Symbolic Processing", in Proc 1986 ACM Conf on LISP and Functional Prog, Aug 1986, pp.279-297]. ["Connection machine LISP Reference Manual", Thinking machines Corp, Feb 1987]. (1995-02-28)