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Lisp Operating System
(metamodular.com)
Its an interesting thought exercise, but has anything else been done since this was posted 8 years ago?
Lisp (historically LISP) is a family of programming languages with a long history and a distinctive, fully parenthesized prefix notation. Originally specified in 1958, Lisp is the second-oldest high-level programming language. Only Fortran is older, by one year.