1. Overview of Volcanism in the Solar System and Available Data 2. Effusive Volcanism (Observations and Processes) 3. Explosive Volcanism (Observations and Processes) 4. Cryovolcanism 5. Lava Compositions (Based on Observations) 6. Melt Production Mechanisms (Based on Modeling) 7. Determining the Ages of Planetary Volcanism 8. Planetary Crust Formation 9. Synthesis and Outlook