"Version: 20201101"--Title page verso.Includes bibliographical references.1. Introduction -- 1.1. What is fluorescence correlation spectroscopy all about? -- 1.2. What do 'fluorescence', 'correlation' and 'spectroscopy' have to do with measuring change? -- 1.3. What can FCS do for you? -- 1.4. What does an FCS measurement involve? -- 1.5. A brief history of FCS -- 1.6. Critical technical steps …