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

# Concepts

> Reference and concepts for people system and social graph in the XBOX Game Development Kit (XBOX Services). Includes concepts and API guidance.

Explore concepts topics for XBOX game development.

<CardGroup cols={2}>
  <Card title="People system (friends list) concepts" icon="users" href="/services/xbox-services/community/people-system/concepts/live-people-system-concepts-nav">
    This section describes the concepts of the People System (Friends List).
  </Card>

  <Card title="Displaying people from the people system" icon="display" href="/services/xbox-services/community/people-system/concepts/live-pplsys-displaying-people">
    a id="top"/a
  </Card>
</CardGroup>

## See also

* [How to](/services/xbox-services/community/people-system/how-to/index)


## Related topics

- [Concepts](/services/xbox-services/multiplayer/invites/concepts/index.md)
- [Matchmaking concepts](/services/xbox-services/multiplayer/matchmaking/concepts/live-matchmaking-concepts-nav.md)
- [Multiplayer concepts](/services/xbox-services/multiplayer/concepts/live-multiplayer-concepts-nav.md)
- [Reputation concepts](/services/xbox-services/community/reputation/concepts/live-reputation-concepts-nav.md)
- [Invites concepts](/services/xbox-services/multiplayer/invites/concepts/live-invites-concepts-nav.md)