1. Principles and Techniques in Chemical and Biological Sensing.- 2. Overview of Strategies in Fluorescence Sensing.- 3. Fluorescence Detection in Sensor Technologies.- 4. Photophysical Mechanisms of Signal Transduction in Sensing.- 5. Organic Dyes and Visible Proteins as Fluorescence Reporters.- 6. Small Luminescent Associates based on Inorganic Atoms and Ions.- 7. Fluorescent Inorganic Particles in Nanoscale World.- 8. General Effects Observed on Dye-dye Association.