Patent ID: 7009599

Claim:
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, wherein the control logic causes the portable device to identify a horizontal position on the display screen responsive to input received through the first linear input device; wherein the control logic causes the portable device to identify a vertical position on the display screen responsive to input received through the second linear input device; wherein the control logic causes the portable device to enlarge and reduce an image displayed on the display screen responsive to input received through the third linear input device; and wherein the control logic causes the portable device to horizontally and vertically scroll the image on the display screen responsive to input received through the planar input device.