1 elcctronic energy level structure 2 transition intensities 3 ion-phonon interzctions 4 line broadening mechanisms and their measuremtnt 5 up- conversion in re-doped solids 6 current topic in arre-earth lasers 7 rare earth materials in optical storage and data processing applications 8 rare earth doped confined structures for lasers and amplifiers 9 rare earth luminescent centers in organic and biochemical compounds