# Dive into the code The developers' Reference section primarily consists of API references of the different core Umbraco APIs. In many cases, the references come with code snippets with examples. The section also includes documentation about the different configuration options, security, advanced templating, and searching.


Configuration	Most configuration in Umbraco CMS is handled via the `appSettings.json` file.	configuration	Documentations Icons_Umbraco_CMS_Reference_Configuration.png
Templating	Work with MVC views and Razor templates to build the frontend for your Umbraco CMS website.	templating	Documentations Icons_Umbraco_CMS_Reference_Templating.png
Querying & Models	Everything you need to extend your templates with filters, models, and more advanced queries.	querying	Documentations Icons_Umbraco_CMS_Reference_Querying_and_Models.png
Routing and Controllers	Dive into working with routers and controllers for customizing your Umbraco CMS even further.	routing	Documentations Icons_Umbraco_CMS_Reference_Routing_and_Controllers.png
Security	Find everything you need related to keeping your Umbraco CMS website secure.	security	Documentations Icons_Umbraco_CMS_Reference_Security.png
Searching	Learn about Examine and Lucene which are tools utilized in Umbraco for the search functionality.	searching	Documentations Icons_Umbraco_CMS_Reference_Searching.png
Notifications	Learn how to use notifications to hook into the workflow processes for the backoffice.	notification-handler	Documentations Icons_Umbraco_CMS_Reference_Notifications.png
Caching	Learn how to implement caching features in the Umbraco CMS application.	cache	Documentations Icons_Umbraco_CMS_Reference_Caching.png
API Documentation	Dive into the deep end and start exploring the different sections of the Umbraco CMS API.	api-documentation	Documentations Icons_Umbraco_CMS_Reference_API_Documentation.png

## Also in this section {% content-ref url="using-ioc" %} [using-ioc](https://docs.umbraco.com/umbraco-cms/reference/using-ioc) {% endcontent-ref %} {% content-ref url="response-caching" %} [response-caching](https://docs.umbraco.com/umbraco-cms/reference/response-caching) {% endcontent-ref %} {% content-ref url="plugins" %} [plugins](https://docs.umbraco.com/umbraco-cms/reference/plugins) {% endcontent-ref %} {% content-ref url="common-pitfalls" %} [common-pitfalls](https://docs.umbraco.com/umbraco-cms/reference/common-pitfalls) {% endcontent-ref %} {% content-ref url="debugging" %} [debugging](https://docs.umbraco.com/umbraco-cms/reference/debugging) {% endcontent-ref %} {% content-ref url="language-variation" %} [language-variation](https://docs.umbraco.com/umbraco-cms/reference/language-variation) {% endcontent-ref %}