Abstract: An arm-mounter mechanism affording users almost unlimited mobility, alternately adaptable to personal computers, digital assistants, cellular phones, cameras, audio recorders, barcode scanners, multimedia remote controls, MIDI controllers, gaming devices and others. One embodiment, utilized with speech recognition technology, provides monitor and/or keys on an arm-mounted first element movable attached to allow rotation, swiveling and/or tilting of this element relative to the arm. A second, optional element rests on projections from the arm-mounting mechanism, allowing interface with the hand of the device-bearing arm. Data processing, transmission, reception and storage equipment typically resides within the first element. The second element may be retractable to fit under sleeve. Another embodiment is a laptop PC reconfigurable for arm use. An alternative mechanism arm-mounts pre-existing devices.