Now LISP has the big three. CL, Scheme and Clojure. Each introduces a fundamentally different way of thinking and all come from standards or standard implementa

Now LISP has the big three. CL, Scheme and Clojure. Each introduces a fundamentally different way of thinking and all come from standards or standard implementations. There is also Newlisp, more akin to R and Julia and other LISPs each bringing some new things on the table. Still you need to have an idea from the big three to appreciate what LISP is all about.