| Name | Description |
| capabilities | The Capabilities class determines the abilities of the system and player hosting a SWF file, which lets you tailor content for different formats. |
| IME | The IME class lets you directly manipulate the operating system's input method editor (IME) in the Flash Player application that is running on a client computer. |
| security | The System.security class contains methods that specify how SWF files in different domains can communicate with each other. |