> For the complete documentation index, see [llms.txt](https://docs.auterion.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.auterion.com/hardware-integration/auterionos-system-guide/development-workflow.md).

# Introduction

Manufacturers can modify many aspects of AuterionOS and APX4 Autopilot, as well as pre-install applications.

For the subsequent developer workflow guide you will need the [Auterion Developer Tools](/hardware-integration/auterion-developer-tools.md) which include various tools, scripts, files and examples to help you customize your own distribution of AuterionOS.

## OEM developer setup

Auterion OEM tools are used to customize AuterionOS by modifying it, extending it with additional applications or by integrating a custom APX4 firmware for the flight controller:

{% content-ref url="/pages/J4I09gOPuRy1o4MRUlgP" %}
[AuterionOS Customization](/hardware-integration/auterion-developer-tools.md)
{% endcontent-ref %}

## Customizing and extending AuterionOS

The page about the [auterion developer tools](/hardware-integration/auterion-developer-tools.md) captures some methods of customizing AuterionOS and as well as packaging APX4 firmware as well as how to package the final AuterionOS image.