> ## Documentation Index
> Fetch the complete documentation index at: https://docs.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.

> [card] [People system (friends list) concepts](https://docs.xbox.com/services/xbox-services/community/people-system/concepts/live-people-system-concepts-nav.md)
>
> This section describes the concepts of the People System (Friends List).

> [card] [Displaying people from the people system](https://docs.xbox.com/services/xbox-services/community/people-system/concepts/live-pplsys-displaying-people.md)
>
> Call patterns for displaying XBOX Live People List data by combining People, Presence, Profile, and Leaderboards services with the People moniker.

## See also

* [How to](https://docs.xbox.com/services/xbox-services/community/people-system/how-to/index.md)


## Related topics

- [Concepts](https://docs.xbox.com/services/xbox-services/multiplayer/invites/concepts/index.md)