There are three environments for constructing lists. In each one each new
item is begun with an \item command. In the itemize environment
the start of each item is given a marker, in the enumerate
environment each item is marked by a number. These environments can be nested
within each other in which case the amount of indentation used
is adjusted accordingly:
The third list making environment is description. In a description you
specify the item labels inside square brackets after the \item command.
For example: