# Juju > Juju is an open source orchestration engine for deploying, integrating, and managing applications across Kubernetes, VMs, and bare metal using software operators called charms. 2026 CC-BY-SA, Canonical Ltd. ## Pages in this subsection - [List of model configuration keys](https://documentation.ubuntu.com/juju/3.6/reference/configuration/list-of-model-configuration-keys.md): This document gives a list of all the configuration keys that can be applied to a Juju model. ## Optional - [Top-level llms.txt](https://documentation.ubuntu.com/juju/3.6/llms.txt): Complete documentation index.