BS: So the graphics, would you see that as part of the user interface or is that a component in its own right?
DS: It's a component in its own right but often - you - need to give people visual clues to help them. And - when I was talking before about it being intuitive, to be intuitive that doesn't mean that you avoid words altogether. You avoid chunks of text. But in terms of giving them an arrow - saying "turn" that's the kind of visual clue that you need to give them, you need to give them - and if - also labelling of buttons and things like that, that kind of labelling is actually really important. Because however great the exhibit is, if people can't work out what they're what they're pressing - and it's, it's nice to avoid words because it means that, people who are either can't read because they're too young or because they speak a different language, can use the exhibit. So, it's really helpful if you can avoid them. Sometimes you can't, and you have to put in words. But generally you know, arrows or colours flashing lights, can help people to know - what to do or what process to do things in. That kind of thing.