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The pointing stick (trademarked by IBM as the TrackPoint and by Synaptics as the TouchStyk) is an isometric joystick used as a pointing device (compare especially touchpad and trackball). It was invented by research scientist Ted Selker. It is present on many brands of laptops, including Lenovo's line of ThinkPad laptops, Toshiba Tecra laptops, HP business notebooks and on Dell Latitudes under the name of Track Stick. It has also been used on computer mice and on some desktop keyboards (as an integrated pointing device).