Bridged Polyphenylenes – from Polyfluorenes to Ladder Polymers -- Polyfluorenes for Device Applications -- Poly(dibenzosilole)s -- Poly(2,7-carbazole)s and Related Polymers -- Polyfluorenes with On-Chain Metal Centers -- Fluorene-Based Conjugated Oligomers for Organic Photonics and Electronics -- Polyfluorene Photophysics -- Structure and Morphology of Polyfluorenes in Solutions and the Solid State -- Optically Active Chemical Defects in Polyfluorene-Type Polymers and Devices -- Single Molecule Spectroscopy of Polyfluorenes.