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].