Abstract: A handheld palm-type device senses that it is being held in a human hand, but not any specific human hand. It can sense whether it is held in any human hand. A handheld palm-type device with keys for data entry and apparatus for preventing inadvertent striking of the keys when the palm-type device is not handheld that comprises the combination of an implementation on the device for sensing a bi-stable physical condition having an on state when the device is handheld and an off state when not handheld and apparatus responsive to the sensing means for locking the data entry keys when the off state is sensed. The device has a housing with a surface for engaging the palm of a user's hand so that the sensor means are at the surface that interfaces with the palm of the hand. The bi-stable electrical condition sensed may be temperature, electrical capacitance or resistance at the palm-device interface.

Abstract: A stylus for use with a portable processing system is disclosed. The stylus comprises a pointing member that is changeable in circumference when utilized. A stylus in accordance with the present invention can be expanded or contracted in very small amounts to adjust to the size of a user's fingers and hand, as well as a user's comfort level and specific health needs, thereby making much longer periods of usage far more pleasant and productive, yet such a stylus will still fit within the small size holes in a portable processing system or the recessed area often provided for a stylus in a computerized drawing tablet.

Abstract: A stylus for use with a portable processing system is disclosed. The stylus comprises a pointing member that is changeable in circumference when utilized. A stylus in accordance with the present invention can be expanded or contracted in very small amounts to adjust to the size of a user's fingers and hand, as well as a user's comfort level and specific health needs, thereby making much longer periods of usage far more pleasant and productive, yet such a stylus will still fit within the small size holes in a portable processing system or the recessed area often provided for a stylus in a computerized drawing tablet.