National Institute of Standards and Technology (NIST) and another at the Leuven University in Belgium. In these units, braille dots are put on the edge of a spinning wheel, which allows the user to read continuously with a stationary finger while the wheel spins at a selected speed. The braille dots are set in a simple scanning-style fashion as the dots on the wheel spin past a stationary actuator that sets the braille characters. As a result, manufacturing complexity is greatly reduced and rotating-wheel braille displays, when in actual production, should be less expensive than traditional braille displays. Braille e-book See also GNOME accessibility VoiceOver References External links Information on Bi-directional Refreshable Tactile Display US Patent 6,692,255 American inventions Computer accessibility Braille technology Haptic technology