# Document history
<a name="doc-history"></a>

The following table describes significant changes to this guide. If you want to be notified about future updates, you can subscribe to an [RSS feed](https://docs.aws.amazon.com/prescriptive-guidance/latest/amazon-emr-hardware/amazon-emr-hardware.rss).

| Change | Description | Date | 
| --- |--- |--- |
| [Clarification](#doc-history) | Revised the [capacity-estimation examples](https://docs.aws.amazon.com/prescriptive-guidance/latest/amazon-emr-hardware/capacity.html). | August 10, 2023 | 
| [–](#doc-history) | Initial publication | October 29, 2021 |