Abstract: A computer keyboard has a chassis, internal components and keys, at least one heating element positioned in an opening into the chassis, and at least one fan positioned to urge air over the heating element and into the chassis. Air entering the chassis over the heating element is urged upward through the chassis and around the keys into a region above the keys.

Abstract: A computer keyboard has a chassis, internal components and keys, at least one heating element positioned in an opening into the chassis, and at least one fan positioned to urge air over the heating element and into the chassis. Air entering the chassis over the heating element is urged upward through the chassis and around the keys into a region above the keys.

Abstract: A treadmill folds for storage and includes a main frame structure, a pivoting frame, a resisting mechanism, an articulating structure, and an articulating mechanism. The pivoting frame pivotally mounts to the main frame structure along a main pivot axis such that a user may pivot the pivoting frame between a substantially vertical position and a substantially horizontal position. The pivoting frame supports a conveyor. The resisting mechanism applies a torsional resisting moment to the pivoting frame. The resisting moment opposes a moment which gravity induces on the pivoting frame. Upon moving the pivoting frame between the vertical position and the horizontal position, the articulating mechanism automatically articulates the articulating structure between a stored, retracted position and an extended position which stabilizes the treadmill.