- A trackball is manipulated by ___________
- palm and fingers
- foot and fingers
- fingers and eyes
- sound and sense
- None of these
- control sound on the screen
- computer gaming
- enter text
- draw picture
- print text
- 90 degree angle
- 180 degree angle
- 360 degree angle
- 45 degree angle
- None of these
- Light pen
- Joystick
- Mouse
- Keyboard
- None of these