Quick Navigation of Drop Down Lists

This is just something I've picked up using the online catalogs at work. If you are using a site or any software that has long dropdown lists you can hit the first letter of the word or item you want and you'll normally be taken to the first word beginning with that letter in the list, but then you still have to go down to the item you want if not first in the list. I've found hitting the letter after the one you want will normally give you a view of all the words or selections you actually want.