CURRENCY SIGN IS X’…’ clauses given their characters by decode, the program’s code page, and
checked as an alphanumeric literal-6 is (Language Reference SC27-8713-03, pp. 129-130).
Every program in the source, first to last, with nested programs after the one containing them,
except that the first program comes ahead of the user-defined functions and prototypes before
it, as the binder’s ENTRY statement makes it the one a run enters (assumption C270).