> For the complete documentation index, see [llms.txt](https://cuhhub.gitbook.io/noir/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cuhhub.gitbook.io/noir/tutorials/libraries-vs-services.md).

# Libraries VS Services

Libraries and services may seem quite similar, but they have their differences. This page will go over the differences.

## Overview

Libraries and Services are used for organizational purposes within Noir. They separate independent and reusable code from game affecting code.

See [What Are Libraries](/noir/tutorials/libraries.md#what-are-libraries) and [What Are Services](/noir/tutorials/services.md#what-are-services).

## Services

Services **manage and store data** and **act upon game events** (although not always).

Services may interact with each other in various ways or utilize libraries. However, a library should be considered if the code could be reused and doesn't affect the game directly.

## Libraries

Libraries contain code that can be used elsewhere, which is useful for **separation, organization, ease of use and reduced repeated code**.

Libraries shouldn't interact with services or the game directly, but they can utilize other libraries.\
A service should be considered if the code may affect the game or use game events.