1. A self-contained, wearable computer system comprising: a) a multi-compartment case; b) a compact computing unit that is housed within the case, the case and computing unit configured such that a wearer may support the case for use with at least a first hand, while the first hand of a user may also be employed to actuate portions of a user interface of the computing unit while supporting the case; c) a visor mounted display, which is operatively coupled to the computing unit, is worn on the head of a user and structured to enable a movable portion thereof to be selectively moved by a wearer between a closed position, enabling improved forward vision by the wearer, or an open position enabling the wearer to view information presented to the wearer on a display unit of the display, the viewed information coupled from the computing unit to the display; d) the multi-compartment case including a compartment configured to house the visor mounted display when not being used by the wearer; and e) means to support the case upon a wearer's body.