A pointing stick is an isometric joystick used as a pointing device, as with a touchpad or trackball, and typically mounted in a computer keyboard on a laptop or desktop computer. Movements of the pointing stick are echoed on the screen by movements of the pointer (or cursor) and other visual changes.
The pointing stick operates by sensing applied force, by using a pair of resistive strain gauges. The velocity of the pointer depends on the applied force. On a QWERTY keyboard, the stick is embedded between the "G", "H" and "B" keys, and the mouse buttons are placed just below the space bar. The mouse buttons can be operated right-handed or left-handed due to their placement below the keyboard along the centerline.
The pointing stick has a replaceable rubber cap, traditionally red on the ThinkPad but also found in other colors on other machines. The cap can be a slightly rough "eraser head" material (Classic Dome) or other optional shapes (Soft Dome or Soft Rim).
Read more about Pointing Stick: Features, Problems, History, Comparison With Touchpads, Naming and Brands, Other Uses
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