Wired News: Conversation With Marc Andreessen Andreessen: We always figured there'd be a much more sophisticated way of navigating, but no one ever came up with it.

Things like the Back and forward button, we never intended that to be a permanent part of the interface. But people get locked into metaphors. You have to be careful with the metaphors you put in front of people because once they click onto one, that's it.

WN: If you were to design Mosaic again, what would you do differently?

Andreessen: If I had to do it over again, I'd probably show some sort of graphical representation of a tree, so you could see what path you're traveling on and could backtrack. I'd also include thumbnail renderings on the tree to show where you'd been.