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