list
A data structure holding many values, possibly of
different types, which is usually accessed sequentially,
working from the head to the end of the tail - an "ordered
list". This contrasts with a (one-dimensional) {array}, any
element of which can be accessed equally quickly.
Lists are often stored using a cell and pointer arrangement
where each value is stored in a cell along with an associated
pointer to the next cell. A special pointer, e.g. zero, marks
the end of the list. This is known as a (singlely) "linked
list". A doublely linked list has pointers from each cell to
both next and previous cells.
An unordered list is a {set}.
(1998-11-12)