> ## Documentation Index
> Fetch the complete documentation index at: https://dimensional-swastika-fix-mint-pages-format.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Concepts

This page explains general concepts.

## Table of Contents

* [Modules](/docs/usage/modules.md): The primary units of deployment in DimOS, modules run in parallel and are python classes.
* [Streams](/docs/usage/sensor_streams/index.md): How modules communicate, a Pub / Sub system.
* [Blueprints](/docs/usage/blueprints.md): a way to group modules together and define their connections to each other.
* [RPC](/docs/usage/blueprints.md#calling-the-methods-of-other-modules): how one module can call a method on another module (arguments get serialized to JSON-like binary data).
* [Skills](/docs/usage/blueprints.md#defining-skills): An RPC function, except it can be called by an AI agent (a tool for an AI).
* Agents: AI that has an objective, access to stream data, and is capable of calling skills as tools.