16:
user input
mouse
picking
TouchSensor (button)
[»]
dragging
PlaneSensor (sliders)
[»]
CylinderSensor (knobs)
[»]
SphereSensor (tumblers)
[»]
DropSensor
[»]
sensor toy
[»]
color picker
[»]
keyboard
KbdSensor
[»]
character navigation
[»]
joysticks
hotrod
[»]
x-arcade
[»]