1# Subsystem Development Guidelines<a name="EN-US_TOPIC_0000001111199452"></a> 2 3- **[Compilation and Building](subsys-build.md)** 4- **[Distributed Remote Startup](subsys-remote-start.md)** 5- **[Graphics](subsys-graphics.md)** 6- **[Multimedia](subsys-multimedia.md)** 7- **[Utils](subsys-utils.md)** 8- **[AI Framework](subsys-aiframework.md)** 9- **[Data Management](subsys-data.md)** 10- **[Sensor](subsys-sensor.md)** 11- **[Application Framework](subsys-application-framework.md)** 12- **[OTA Update](subsys-ota-guide.md)** 13- **[Telephony](subsys-tel.md)** 14- **[Security](subsys-security.md)** 15- **[Startup](subsys-boot.md)** 16- **[Test Case Development](subsys-testguide-test.md)** 17- **[DFX](subsys-dfx.md)** 18- **[R&D Tools](subsys-toolchain.md)** 19- **[XTS Test Case Development](subsys-xts-guide.md)** 20 21 22