Before starting out with the Unity Editor, you might want to familiarize yourself with the platforms that you can create your projects in. Unity supports most of the leading desktop, web, and mobile platforms:
Note: If you are a developer with access to Closed platforms, you might have more platform options after you download and register your preferred platform setup. For more information, visit the Platform Module Installation page.
For a full list of platforms that Unity supports and to know the minimum system requirements for these platforms, refer to System Requirements.