Free/Libre and Open Source Software (FLOSS) is a complex ecosystem made up of businesses, communities, individuals, markets, legislation and more. This compact presentation outlines the major forces in the ecosystem, along with the behaviours and needs of the key actors. Attendees can expect to come away with a practical, high-level model of FLOSS that they can use to get the most from their use of FLOSS and their participation in the FLOSS world.