# 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](https://docs.auterion.com/hardware-integration/auterion-developer-tools) 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="../auterion-developer-tools" %}
[auterion-developer-tools](https://docs.auterion.com/hardware-integration/auterion-developer-tools)
{% endcontent-ref %}

## Customizing and extending AuterionOS

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