> (Ford Prefect describing the black ship - the one with black
> buttons that lit up black to let you know you did something.
> Obviously it was designed for a species that could perceive
> different wavelengths of the EM spectrum than humans).
Actually the Jargon File describes such devices as DEDs (Dark Emitting
Diodes.) Some semiconductor manufacturers reportedly have already
issued data sheets for those in the past.
--=20
Thomas.Quinot@Cuivre.FdN.FR <URL:http://Web.FdN.FR/~tquinot=
/>