# 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 - [Worker](https://documentation.ubuntu.com/juju/2.9/reference/worker.md): In a Juju deployment, a **worker** is a process that a Juju agent runs in the background on a Juju e... ## Optional - [Top-level llms.txt](https://documentation.ubuntu.com/juju/2.9/llms.txt): Complete documentation index.