A parallel extension of Scheme with explicit concurrency. The form (future X) immediately returns a "future", and creates a task to evaluate X. When the evaluation is complete, the future is resolved to be the value.
["MultiLisp: A Language for Concurrent Symbolic Computation", R. Halstead, TOPLAS pp.501-538 (Oct 1985)].
[Did MultiLisp use PVM as its intermediate language?]