1. A portable electronic device, comprising: a display screen on a front face of the portable device, a first linear input device affixed along a first side of the display screen; a second linear input device affixed along a second side of the display screen; a third linear input device affixed along a third side of the display screen; a planar input device on a back face of the portable device; and control logic for manipulating content displayed on the display screen responsive to user input via the first, second, third, and planar input devices.