# Basics

- [Extending Pinot](/release-0.10.0/developers/developers-and-contributors/extending-pinot.md)
- [Writing Custom Aggregation Function](/release-0.10.0/developers/developers-and-contributors/extending-pinot/custom-aggregation-function.md)
- [Segment Fetchers](/release-0.10.0/developers/developers-and-contributors/extending-pinot/segment-fetchers.md)
- [Contribution Guidelines](/release-0.10.0/developers/developers-and-contributors/contribution-guidelines.md)
- [Code Setup](/release-0.10.0/developers/developers-and-contributors/code-setup.md)
- [Code Modules and Organization](/release-0.10.0/developers/developers-and-contributors/code-modules-and-organization.md): TODO: Deprecated
- [Update Documentation](/release-0.10.0/developers/developers-and-contributors/update-document.md)