The Segway PT is a two-wheeled, self-balancing, battery-powered electric vehicle invented by Dean Kamen. It is produced by Segway Inc. of New Hampshire. The name Segway is derived from the word segue, meaning smooth transition. PT is an abbreviation for personal transporter.Computers, sensors, and electric motors in the base of the Segway PT keep the device upright when powered on with balancing enabled.