Abstract: A screen operator or artificial finger tip for entering commands and data into a personal data device, such as an electronic notebook, by contacting the screen of the personal data device. The screen operator comprises a partially rigid base that encircles the finger, generally conforming to the finger, and a rigid tip member which projects forwardly from the base to contact the screen. The extreme tip of the tip member is of reduced diameter at the point of contact with the screen. The base is tubular (preferably with a gap) and resiliently grips the finger. A hook member extends downwardly and back from the tip member to engage the underside of the user's finger tip. The hook member functions to retain the screen operator on the user's finger tip.