FUBS.md

@@ -82,6 +82,10 @@ We have an almost pathological focus on minimalism.  We want the functionality o
     * A string constant may be specified in a program.  It will manifest itself as a mutable array of single bytes with a null terminator.
   * [Balls](https://en.wikipedia.org/wiki/Exception_handling):
     * Exists only on a trial basis.  Will be evaluated on an ongoing basis.  Candidate for removal.
+  * [Closures](https://en.wikipedia.org/wiki/Closure_(computer_programming))
+    * Stack variables can be captured by reference (default) or by value (not yet implemented).
+       * If the closure escapes to the heap only capture by value is allowed.
+  * Concurrency is not yet implemented. 
   * Execution model:
     * Fully self hosted.
     * Programs are stored as a binary representation of its abstract syntax tree.