(Always called "Id") A non-strict, {single assignment} language and {incremental compiler} developed by Arvind and Gostelow and used on MIT' s {Tagged-Token Dataflow Architecture} and planned to be used on {Motorola}' s Monsoon. See also Id Nouveau. ["An Asynchronous Programming Language for a Large Multiprocessor Machine", Arvind et al, TR114a, Dept ISC, UC Irvine, Dec 1978]. ["The U-Interpreter", Arvind et al, Computer 15(2):42-50, 1982]. (1998-02-14)