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Thousands of people use Processing every day. Like them, you can download Processing without cost. You even have the option to modify the Processing code to suit your needs. Processing is a FLOSS project (that is, free/libre/open source software), and in the spirit of community, we encourage you to participate by sharing your projects and knowledge online at Processing.org and at the many social networking sites that host Processing content (Figure 1-5). These sites are linked from the Processing.org website.