Number 2 (Story #3), October 4, 1990 by Phillip F. Schewe and Ben Stein AMERICAN VACUUM SOCIETY MEETING IN TORONTO (October 8-12): Highlights of this annual national meeting include sessions on biomaterial surfaces, nano engineering, high-temp. superconductivity, and new plasma processing techniques. At a session on silicon-based heterostructures, certain speakers will suggest that SiGe heterostructures may rival their GaAs counterparts in switching speed and may even be light emitting, a fact which would have important implications for opto-electronic applications. (See the "Announcements and News Release section of Pinet for more information. The meeting program chair is Frank Jansen, Xerox, 716-422-8525.)