caar                    Composite 'car'/'cdr'
cadar                   Composite 'car'/'cdr'
caddr                   Composite 'car'/'cdr'
cadr                    Composite 'car'/'cdr'
car                     First element of a list
cdddr                   Composite 'car'/'cdr'
cddr                    Composite 'car'/'cdr'
cdr                     Return elements after the first of a list.
cdrs                    Try to get the 'cdrs'; otherwise, return 'nil'.
for.each                Apply 'f' to the successive elements of '...'.
is.even                 Is a number even?
is.nil                  Whether a list is empty.
is.odd                  Is a number odd?
last                    Last element in a list.
nil                     The empty list
pair.fold.right         pair-fold-right from SRFI-1.
pairwise                Combine a list into pairwise elements; lists
                        should be of the same length. In case of odd
                        numbers of members, the last will be removed.
zip                     Zip _n_ lists together into tuplets of length
                        _n_.
zip.c                   Zip using 'c'.
zip.list                Zip using 'list'.
zip.with.names          Do a less efficient zip whilst preserving
                        names.
