Abstract: An ergonomic system for placing primary inputs on the back, bottom, or sides of an electronic device. By way of example, the system places two primary inputs at each finger position and makes use of a ‘dual-subset’ chordal keyboard input design that effectively doubles the number of available inputs. The result is a system in which the operator's fingers never need to move from their positions on the backside of the device yet the operator can instantly access character/function sets as large as a complete alphabet, allowing for rapid typing speed and extensive device control, even on a small hand-held electronic device.