> Today, everyone knows about CTRL+F. Not everyone knows that, I don't even think to try it unless there's a corresponding control or menu item. It's also not

> Today, everyone knows about CTRL+F. Not everyone knows that, I don't even think to try it unless there's a corresponding control or menu item. It's also not universal, outlook is one of the most heavily used GUIs in the world and ctrl-f means forward in that. Then you've got the ubiquity of touch screens where ctrl-f isn't even an option. > They were probably formally studying people who had never seen or used a GUI before Everyone's seen a GUI, but that doesn't mean they've seen the particular GUI they're trying to use at any given time.