(mapcar function list1 [list2 ...])
Apply the function to the list.
This function is one of the most powerful tools for handling large lists. Mapcar performs a function on each of the elements of a list, and then returns a second list. There can be multiple lists, but each list must have the correct number of items for the function to affect all the lists at one time.
(mapcar '* '(5 3 2) '(2 2 2))
(10 6 4)
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(apply function list)
(defun [c:] name ([arg1 arg2 ...] / [local-var1 local-var2 ...]) expression)
Programming Overview of LISP (LISt Processing) Language