A computer keyboard includes position sensors such as capacitive sensors on each of the keys for monitoring positions of fingertips on the keys. A processor receives an indication of contact of a finger on a surface of a key, including an identity of the key and an indication of a position of the contact on the surface. The processor also receives an indication of a motion gesture comprising displacement of the position of the contact on the surface of the key. Using the identity of the key and the indication of the motion gesture, an input from a human operator is determined.