# App Development Overview<a name="EN-US_TOPIC_0000001123678714"></a>

This document provides guidance on how to develop apps through the JS APIs provided by OpenHarmony on the standard system.

To get a glimpse of the basic methods for developing apps, see  [Quick Start](quick-start/Readme-EN.md). For details about the API list and references, see  [JS Reference](js-reference/Readme-EN.md).

To better understand frequently-used modules, see the development guidelines for  [UI](ui/Readme-EN.md),  [media](media/Readme-EN.md), and  [networks and connectivity](connectivity/Readme-EN.md).

For details about the principles and basic information of each subsystem, see the related README file in  **docs/en/readme**.

