A ‘typical’ computer system
screen, or monitor, on which there are windows
keyboard
mouse/trackpad
variations
desktop
laptop
PDA
the devices dictate the styles of interaction that the system supports
If we use different devices, then the interface will support a different style of interaction
How many …
computers in your house?
hands up, … … none, 1, 2 , 3, more!!
computers in your pockets?