> ## Documentation Index
> Fetch the complete documentation index at: https://docs.arc-manager.net/llms.txt
> Use this file to discover all available pages before exploring further.

# Core Concepts

> Arc Manager models your shop using four item types:

* [Materials](materials)
* [Hardware](hardware.mdx)
* [Components](components.mdx)
* [Products](products.mdx)

Each builds on the previous to calculate accurate costs.