# Sense

**Grey Matter Sense** consists of four primary components: [**Grey Matter application**](https://greymatter.gitbook.io/grey-matter-documentation/1.3/reference/setup/sense/application), [**SLO**](https://greymatter.gitbook.io/grey-matter-documentation/1.3/reference/setup/sense/slo), [**Business Impact**](https://greymatter.gitbook.io/grey-matter-documentation/1.3/usage/application/businessimpact) and [**Catalog**](https://greymatter.gitbook.io/grey-matter-documentation/1.3/reference/setup/sense/catalog).

![Image of Sense layers](https://1676458320-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LsNFVozLgvw3NDMzxBg%2F-M2ZbrbvadB7jRbqgvT8%2F-M2ZbtQocnD2oP_iMgTZ%2Fgrey-matter-layers-sense-8x-squashed-no-title.png?generation=1584383630376406\&alt=media)

Get a refresher on how Sense fits into Grey Matter's architecture.

{% content-ref url="../../internals/core-components" %}
[core-components](https://greymatter.gitbook.io/grey-matter-documentation/1.3/internals/core-components)
{% endcontent-ref %}

## Components

{% content-ref url="sense/application" %}
[application](https://greymatter.gitbook.io/grey-matter-documentation/1.3/reference/setup/sense/application)
{% endcontent-ref %}

{% content-ref url="sense/slo" %}
[slo](https://greymatter.gitbook.io/grey-matter-documentation/1.3/reference/setup/sense/slo)
{% endcontent-ref %}

{% content-ref url="sense/catalog" %}
[catalog](https://greymatter.gitbook.io/grey-matter-documentation/1.3/reference/setup/sense/catalog)
{% endcontent-ref %}