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Local SPECIAL declarations

 I want to put in a good word for the use of local rather than
global "SPECIAL" declarations.   Local Specials are the perfect
way to implement communication among functions that aren't
lexically related, and where the information being passed
in the specials is only needed among a few functions.  The
discipline of including the SPECIAL declaractions in every 
function focuses attention on the fact that this particular
variable is indeed "special" in the ordinary sense as well
as lisp's sense of the word.