There are many Lisp languages like Common Lisp, Scheme, Clojure, etc., and they’re quite different to each other. For examples, one needs main as the entry point, another has while loops, some use t and nil while others use #t and #f, one has its codes starting with #lang, and so on. My question is, which language in the Lisp family is the most similar to the original LISP, be it in syntax, features, or appearances?