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About Us

Research and Development Institute is a nonprofit corporation established in Illinois in 1992. It is headquartered in Sycamore, Illinois. The major focus of the organization is to carry out research and development activities in the area of rehabilitation and education for persons who are blind or visually impaired. Since its inception, the staff of RDI has produced several pieces of software which can be used for increasing access to mathematics by individuals who read braille. In addition, articles and books on various aspects of assistive technology and mathematics have been produced by the RDI team. For more information, contact:

Research and Development institute
P. O. Box 351
Sycamore, IL 60178

The president of the corporation is Gaylen Kapperman. He can be contacted at