Online Site Aids Visually Impaired
A Purdue University research and development program has created a program
that allows visually impaired students to work with charts, graphs, diagrams,
and maps. A drawing printed on special paper is run through a heater that
causes the black ink lines, Braille letters and markings to bubble up in a
raised image. (AP 15 Feb 99) 

    http://www.purdue.edu/odos/TAEVIS/index.htm