Complex sentence: These computers are also known for their iconic red TrackPoint, a variation on a joystick, in the middle of the keyboard and invented by IBM Research scientists Ted Selker and Joe Rutledge.
Split into simpler sentences: These computers are also known for their iconic red TrackPoint, a variation on a joystick, in the middle of the keyboard. TrackPoint was invented by IBM Research scientists Ted Selker and Joe Rutledge.