A keyboard for use with a standard personal computer includes an alphanumeric key array having a plurality of alphanumeric keys arranged in a generally orthogonal, concave array. A home row of keys defines a reference position for the fingers of the operator. A linear array of function keys...http://www.google.com/patents/US5673040?utm_source=gb-gplus-sharePatent US5673040 - Ergonomic keyboard apparatus
