Collapsible portable mouse

A computer mouse (10/10') collapses into a smaller form. In one embodiment a cover (44) slides to hide or reveal buttons (22) and collapse or extend the length of the mouse. in another embodiment a lever (66) is moved in one direction to bow the mouse surface and reveal buttons (22). Move the lever (66) the other way and the mouse (10/10') collapses in height and the buttons (22) are hidden. In another embodiment a contoured leaf spring (94) shapes the mouse (10/10'). When relaxed, the spring (94) is generally convex. Push down on the mouse (10/10') and a latch (98) captures the spring (94) in an extended position reducing the height for storage and transport. Release the latch (98) and the spring (94) relaxes popping the mouse (10/10') into an operable configuration (32). In another embodiment the mouse (10/10') folds in half.