Many futuristic imaginings of user interfaces rely heavily on OOUI and especially OOGUI concepts.[4] However there are many examples of user interfaces that implement one or more of those other ideas, but which are not in fact OOUIs - though they are often wrongly labelled as OOUIs.[5] Conversely, there are examples of OOUIs that are neither graphical, nor employ direct manipulation techniques, nor employ strong metaphors.