Electro-Optics/Laser 77 Conference and Exposition Electro-optics/Laser 78 Conference and Exposition IEEE Applied Power Electronics Conference and Exposition Annual applied power electronics conference and exposition Electron-Optics/Laser Conference and Exposition,Boston,1978. International Electrical,Electronics Conference and Exposition Annual IEEE Applied Power Electronics Conference and Exposition Cleveland Electrical/Electronics Conference and Exposition,1980 Electro-Optics/Laser Conference and Exposition,Anaheim,1977. Powder Metallurgy Conference and Exhibition