What is the box that allows you to select multiple items called?

[kobescoresagain]

Okay I have seen these, but I have no clue what they are called. Basically you have a box of items then you highlight one of them, and click the arrow, and it is in the other box now. This is often used in forms.

Thanks ahead of time.

[Borgs8472]

radio buttons
http://www.echoecho.com/htmlforms10.htm

[Carnage]

i think they are just two multi select select boxes, with some cunning javascript to move things accross when you hit the arrow.