The Free On-line Dictionary of Computing (30 December 2018):

Id Nouveau

   A dataflow language by Arvind  and
   R.S. Nikhil , 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.

   See also Id.

   ["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].