Abstract: A miniature, finger computer mouse is provided, arranged as a sleeve, for wearing on the index finger, at a natural anatomic resting position of the thumb on the finger. Mouse manipulation is achieved by the combined action of the thumb and the index finger, which is controlled by the intrinsic musculature of the hand and is more accurate and more sensible to joint movement than the extrinsic extensors muscles of the forearm. Overuse and overload of the tendons of the upper extremity, and in particular of the forearm, and their consequential orthopedic disorders, are avoided.