An oral device for temporary placement in a patient’s oral cavity includes upper and lower jaw braces and a tongue-engaging member. The lock includes a retainer for releasably holding the lock in the retaining position. A nested hub and transfer drive provide a compact, weight balanced interface. The keyboard may have either a generally unitary construction, or it may have a first portion and a second portion rotatable relative to the first portion while the user manipulates the input devices. The first adhesive member couples the upper end guide frame and panel.