Interface which uses key words (usually at the top of the screen) to identify menus which the user can make appear below (the key word).
Vertical list of choices to the user. This is available once the user selects a choice from a menu bar. The choices are organized from top to bottom according to the frequency in which they are chosen.
Using either a keyboard command or mouse click, exposes a list of commands, usually from the top toolbar, from which you can select the specific action you wish to perform.