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From: new@udel.edu (Darren New)
Newsgroups: comp.lang.misc
Subject: Re: The Fundamental Concept of Programming language X
Message-ID: <7331@nigel.udel.EDU>
Date: 3 Jan 90 19:59:02 GMT
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Reply-To: new@udel.edu (Darren New)
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> FORTH		Threaded code + postfix notation

Actually, the threaded code and postfix notation are not the fundamental
parts of FORTH, but rather seem to me to be there to support:

  FORTH		user-defined data representations, operations, and literals.

For example, try taking the "string" data type out of a language and then
putting it back in without changing the compiler.  Only FORTH and 
LISP allow this sort of thing, and LISP only clumsily. But doing this
requires good user-control over parsing and code generation, thus the 
threaded code and postfix notation. -- Darren