Where you click on a link usually with a plus next to it, and when you click on it information comes up underneath it. Then if you click it again it hides away again. I need to use it but I forgot what it's called.
that's not the technical term but i forget what is, so..... maybe "node"?
It has a name. It's a tree or a node-tree.
Yeah, the GUI control itself is typically called a "tree" or "tree view" control. The individual elements or branches of the tree are called "nodes." When a node has child nodes, it's called a parent node, and you click the parent node (or a plus sign or other icon next to it) in order to expand or collapse the child node list.