Optical TrackPoint
Provided by the ASK Keyboard Dictionary
The Optical TrackPoint was an integrated pointing device introduced by Lenovo in 2011. It was designed as a low-profile alternative to traditional TrackPoint pointing sticks and was exclusively used with two Lenovo ThinkPad Tablet PC keyboards - Lenovo ThinkPad Tablet Keyboard Folio Case (0B33533) and Lenovo ThinkPad Tablet 2 Bluetooth Keyboard with Stand (EBK-209A) - before being discontinued. As they were an optical sensor not unlike the sensors in typical desktop mice, the user must swipe the stick to move the mouse cursor. They are easily distinguished by the black circle in the middle of the usual red nub.
