> For the complete documentation index, see [llms.txt](https://docs.plenit.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.plenit.com/docs-en/productos/object-storage/concepts/glossary.md).

# Glossary

The terms that appear in Object Storage, grouped by topic. If you come across one and it’s not clear, look it up here.

### Storage

| Term                | What it is                                                               |
| ------------------- | ------------------------------------------------------------------------ |
| Object              | A piece of data stored as a unit, along with its associated information. |
| Bucket (repository) | The container where objects are stored.                                  |
| Quota               | The contracted space in the repository, configurable.                    |
| Region              | The location where the repository is hosted.                             |

### Access

| Term       | What it is                                                            |
| ---------- | --------------------------------------------------------------------- |
| S3         | The standard protocol used by software to access the repository.      |
| S3 user    | The identity with which software accesses.                            |
| Access key | The public identifier of an S3 credential.                            |
| Secret key | The private part of the credential, used to authenticate.             |
| Signed URL | A temporary link to download an object without providing credentials. |

### Protection

| Term                       | What it is                                                                     |
| -------------------------- | ------------------------------------------------------------------------------ |
| Versioning                 | The retention of previous versions of an object.                               |
| Immutability (Object Lock) | The locking of objects against deletion or modification for a period.          |
| Triple replication         | A copy of each object on three disks from three different servers.             |
| Automatic deletion         | The deletion of objects after a period of time, according to rules you define. |

### Next steps

* Go back to [Concepts.](/docs-en/productos/object-storage/concepts.md)
* See the reference in [Details.](/docs-en/productos/object-storage/details.md)


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