# Before You Start<a name="EN-US_TOPIC_0000001152006279"></a>
This document provides guidance on how to port the Linux and LiteOS Cortex-A kernels on the OpenHarmony [small system](https://device.harmonyos.com/en/docs/start/introduce/oem_minitinier_des-0000001105598722) to a development board. It is intended for developers with experience in developing embedded systems. Before following instructions in this document, it is recommended that you familiarize yourself with [OpenHarmony](https://gitee.com/openharmony/docs/blob/master/en/OpenHarmony-Overview.md), including its technical architecture, directory structure, kernel subsystem, and driver subsystem. The following table lists the development boards that have been adapted to the small system.
This document provides guidance on how to port the Linux and LiteOS Cortex-A kernels on the OpenHarmony [small system](https://device.harmonyos.com/en/docs/start/introduce/oem_minitinier_des-0000001105598722) to a development board. It is intended for developers with experience in developing embedded systems. Before following instructions in this document, it is recommended that you familiarize yourself with [OpenHarmony](../../OpenHarmony-Overview.md), including its technical architecture, directory structure, kernel subsystem, and driver subsystem. The following table lists the development boards that have been adapted to the small system.
**Table 1** Development boards compatible with the OpenHarmony small system
