1. a Xerox Corporation , Joseph C. Wilson Center for Technology , Xerox Square, W-114, Rochester, New York, 14644, U.S.A.
2. b GTE Laboratories, Inc. , Advance Technology Laboratory , 40 Sylvan Road, Waltham, MA 02154
3. c Co-operative Education Student , Drexel University , 1978–79
4. d Co-operative Education Student , Rochester Institute of Technology , 1978–79