A dataflow language by Arvind <email@example.com> and R.S. Nikhil <firstname.lastname@example.org>, MIT LCS, ca. 1986.
Id Nouveau began as a functional language, added streams, resource managers and I-structures (mutable arrays). Loops are syntactic sugar for tail recursion.
["Id Nouveau Reference Manual", R.S. Nikhil, CS TR, MIT, March 1988].
["Id (Version 90.1) Reference Manual", R.S. Nikhil, CSG Memo 284-2, LCS MIT, July 15, 1991].