1. Plasma Physics Division, Naval Research Laboratory, 4555 Overlook Ave., Washington, DC 20375
2. Science Applications International Corp., 1710 SAIC Drive, McLean, VA 22102
3. Research Support Instruments Inc., 4325-B Forbes Boulevard, Lanham, MD 20706
4. Berkeley Research Associates Inc., P.O. Box 241, Berkeley, CA 94701-0241