Jon Schneider's Tech Blog: Workaround: Thinkpad gets into "always scroll down" state
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Physical TrackPoint Buttons on a ThinkPad T440s - YouTube
Pointing stick - Wikipedia
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Got a new (to me) laptop. What's the Middle button above the mouse pad but below the space bar? The two side buttons are the left/right mouse click but the middle one
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How To Fix Lenovo laptop touchpad not working in Windows 10 - YouTube
I'm screwed my X230 middle button. Any suggestions to fix? Or parts? : r/ thinkpad
What is the red button on the Thinkpad for? - Quora
The vintage MIPS-based IBM “ThinkPad” (the WorkPad) #MIPS #VintageComputing @IBM « Adafruit Industries – Makers, hackers, artists, designers and engineers!