We call those 'underground projects' here. Everybody from top to bottom in the company knows that they happen. As long as our regular work is getting done, management turns a blind eye to them and certain people and groups are actively encouraged to start them up. I suppose that means they're no longer 'underground', but there is no official support or allocation of resources until something demonstrates clear value. Sometimes I think that we get more real innovation out of these things than the formal R&D projects.