> ## Documentation Index
> Fetch the complete documentation index at: https://docs.pads4.com/llms.txt
> Use this file to discover all available pages before exploring further.

# PADS4 documentation home

> Start here to find the part of PADS4 you need. Choose a dropdown to open installation guides, manuals, certified devices, and the API reference.

PADS4 is a platform with several parts, and each part has its own documentation. Use the dropdown at the top of the left navigation to switch between them, or choose a part below.

## Start here

> [card] [Find a certified device](https://docs.pads4.com/certified-devices/introduction.md)
>
> Check which media players and displays are certified to run the PADS4 Viewer.

> [card] [Check the requirements](https://docs.pads4.com/system-configuration/PADS4-Hardware-Configuration-Guide.md)
>
> Find the hardware requirements for the PADS4 Platform Server.

> [card] [Upgrade PADS4](https://docs.pads4.com/upgrade-info/upgrading-to-pads-4-2025-2.md)
>
> Read the prerequisites and steps before you upgrade an existing installation.

> [card] [Install PADS4](https://docs.pads4.com/install-pads4/Downloads.md)
>
> Download the PADS4 Server and Windows Client, and follow the installation guides.

## Choose a part of PADS4

> [card] [PADS4 Super User](https://docs.pads4.com/ctrl-centre/domains.md)
>
> Manage Domains, Diagnostics, and migration at server level.

> [card] [PADS4 CTRL Center](https://docs.pads4.com/ctrl-centre/introduction.md)
>
> Manage Viewers, content, sensors, users, and integrations from the central web console.

> [card] [PADS4 Digital Signage](https://docs.pads4.com/modules/digital-signage/introduction.md)
>
> Create presentations and schedule them to your Viewers.

> [card] [PADS4 Workspace](https://docs.pads4.com/modules/workspace/workspace-web-application/introduction.md)
>
> Book rooms, desks, and shared services with the web application, mobile application, or Outlook add-in.

> [card] [PADS4 FIDS](https://docs.pads4.com/modules/fids/introduction.md)
>
> Install and operate the Flight Information Display System for airports.

> [card] [API Reference](https://docs.pads4.com/api-reference/introduction.md)
>
> Connect your own systems to PADS4 with the REST API.

> [card] [Plug-ins](https://docs.pads4.com/getting-started.md)
>
> Add products such as the Reporting plug-in.

## Switch to another part

**1. Open the dropdown**

At the top of the left navigation, select the dropdown that shows the current part of PADS4.

**2. Select a part**

Select the part that matches your task, for example **PADS4 Digital Signage**.

> [!TIP]
>
> Not sure which part you need? Use the search at the top of the page. Search looks through all parts at the same time.


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