• Multi-modal systems
– use more than one sense (or mode ) of interaction
e.g. visual and aural senses: a text processor may speak the
words as well as echoing them to the screen
• Multi-media systems
– use a number of different media to communicate
information
e.g. a computer-based teaching system:may use video,
animation, text and still images: different media all using the
visual mode of interaction; may also use sounds, both speech
and non-speech: two more media, now using a different mode