So, what exactly is a List?

• A List is a sequence of objects

• Lists are mutable
• can add/remove objects from a List (push, pop, shift, unshift)
• objects in a List can be mutable or immutable

• List handles laziness, reification, and iteration
• has a reified part and a generator part

• Returned from lazy functions (.map, .grep, gather/take)

• Base class for Array and other List-like classes