Personal Urban Mobility and Accessibility
The Personal Urban Mobility and Accessibility (PUMA) was an experimental electrically powered road vehicle created by Segway and adopted by General Motors as a concept vehicle representing the future of urban transportation. It operates on two wheels placed side by side, a layout that differs in placement from motorcycles which instead have their two wheels placed at the front and rear.
Source: Wikipedia — Personal Urban Mobility and Accessibility (CC BY-SA 4.0)