It still has the old operators: car, cdr, cons, eval, apply, append, cond, quote, lambda, set, setq, atom, and, eq, equal, list, map, mapcon, maplist, nconc, not, null, or, print, prog, read, remprop, rplaca, rplacd, ...
It has the old data structures like symbols and cons cells.
Thus programs from 1960 often can be made running in Common Lisp, unless they make use of system specific functions.
It still has the old operators: car, cdr, cons, eval, apply, append, cond, quote, lambda, set, setq, atom, and, eq, equal, list, map, mapcon, maplist, nconc, not, null, or, print, prog, read, remprop, rplaca, rplacd, ...
It has the old data structures like symbols and cons cells.
Thus programs from 1960 often can be made running in Common Lisp, unless they make use of system specific functions.