an associative set where an index serves as key

a set of values of another type of unspecified length

a special kind of set

the List of Wildlife Species at Risk set out in Schedule 1.

The word list is used in a few places in the manual in the specific sense defined by the YACC grammar in `control.y'. A list is simply a list of words or numbers, and its meaning depends on the context. For example, SET x=3*{1 2 3} will set the vector to be 2 4 6, while MACRO hi { echo Hello} will define the macro hi.