One might say that lineSpace is an interactive "visualization" system for the blind. The key to achieving this is Linespace' large display as it allows displaying a lot of contents at once, where smaller display systems need to update screen contents. The use of lines (instead of the more common Braille dots) helps create visualizations.
The vision behind linespace is to help blind users interact with and make sense of complex spatial data. It thereby intends to pick up the vision behind of Vannevar Bush's memex, Engelbart Online system, and Xerox PARC's personal computer, by investigating how we can recreate this type of interaction for blind users--how to use computers to help people think better.
CHI talk on youtube
video on youtube
Article in New Scientist on Linespace