The auxiliary screen notion combines a small LCD with some basic navigation controls for tasks such as looking up contacts, appointments, e-mail or starting a music jukebox.

ENGADGET: Switched On: Longhorn hardware advances could give PDAs a one-two punch

Bassani's 105-foot Wallygator, launched in 1994, was a two-masted showpiece for experimental technology that included electronic sail controls, touch-screen navigation and swiveling propeller units that could be retracted into the hull.

FORBES: Wallypalooza