+ particular, numeric object IDs. There are plans to fix this.
+
+* Much of the code still uses FORTRAN-style uppercase names.
+
+* The code still assumes one-origin array indexing. Thus, arrays are
+ a cell larger than they strictly need to be and cell 0 is unused.
+
+* The code is still mostly typeless, slinging around machine longs
+ like a FORTRAN or BCPL program. Some (incomplete) effort has been made
+ to introduce semantic types.