With StarLogo, you can model (and gain insights into) many real-life phenomena, such as bird flocks, traffic jams, ant colonies and even market economies. In decentralized systems, orderly patterns can arise without centralized control. Increasingly, researchers are choosing decentralized models for the organizations and technologies that they construct in the world, and for the theories that they construct about the world. But many people continue to resist these ideas, assuming centralized control where none exists - for example, assuming (incorrectly) that bird flocks have leaders. StarLogo is designed to help students (as well as researchers) develop new ways of thinking about and understanding decentralized systems. StarLogo is a specialized version of the Logo programming language. With traditional versions of Logo, you can create drawings and animations by giving commands to graphic turtles on the computer screen. StarLogo extends this idea by allowing you to control thousands of graphic turtles in parallel. In addition, StarLogo makes the turtles world computationally active: you can write programs for thousands of patches that make up the turtles environment. Turtles and patches can interact with one another - for example, you can program the turtles to sniff around the world, and change their behaviors based on what they sense in the patches below. StarLogo is particularly well-suited for Artificial Life projects. You can use StarLogo to create many different kinds of projects - and explore many different phenomena. StarLogo may be used in diverse projects: biology, cellular automata, games, graphics, mathematics, physics, social systems and more. Please read the documentation for more information.