Which device invented at ibm has a pencil eraser–sized joystick at the center of the keyboard?

Trackpoint

Explanation:

A trackpoint is a joystick type of control meant to be used in moving the pointer like the mouse, it was invented by IBM and made it commercially available in 1992, even though the trackpoint is not seen on new laptops but it still exists on some laptops like the Lenovo Thinkpad series.

The disadvantage of the trackpoint is that it provides less accuracy.

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