(follow links for larger images)
The Advance Human Interface Group at the MIT Media Laboratory pursued the "creation and elaboration of the software intelligence to interpret input from speech, hands, and eyes, and to map to an appropriate response in graphics and speech or nonspeech sound", in one form or another for over 10 years under the direction of Dr. Richard Bolt.
The above images are from the summer of 1990. I was working in the group as an undergrad at the time.
AHIG is no more, that's why this is the AHIG Nostalgia Page. However, the spirit lives on in other groups around the lab (Vismod and G&NL come to mind), and at many other labs.