Abstract: The device engages the hand of the operator and maintains same in a fixed position while permitting movement of the fingers. A first rigid part is adapted to be situated adjacent the palm. A second rigid part, aligned with the first part, is adapted to be situated adjacent the back of the hand. The first and second parts are mounted in a fixed, spaced relationship to engage the hand therebetween. The pushbuttons are mounted in sets, each set being aligned with a different finger and adapted to be operated by the pivotal movements of the finger in its plane as the finger is moved relative to the palm.