# Using unmanaged collection types

> Use unmanaged collection types in Unity.

The `Unity.Collections` namespace provides unmanaged data structures that you can use in [jobs](/engine/7000.0/manual/scripting/programming-distribute-work-threads/job-system.md) and [Burst-compiled](/engine/7000.0/manual/programming-environment/script-compilation/burst.md) code.

| **Topic**                                                                                                                     | **Description**                                                              |
| ----------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------- |
| **[Introduction to unmanaged collections](/engine/7000.0/manual/analysis/performance-memory/collections/overview.md)**        | Understand the key features and limitations of the `Unity.Collections` APIs. |
| **[Collection types reference](/engine/7000.0/manual/analysis/performance-memory/collections/collection-types.md)**           | Understand the collection types available in the `Unity.Collections` APIs.   |
| **[Parallel readers and writers](/engine/7000.0/manual/analysis/performance-memory/collections/parallel-readers.md)**         | Manage concurrent reading from and writing to unmanaged collections.         |
| **[Use allocators to control unmanaged memory](/engine/7000.0/manual/analysis/performance-memory/collections/allocation.md)** | Understand how to use allocators to control unmanaged memory.                |

## Additional resources

* [Job system documentation](/engine/7000.0/manual/scripting/programming-distribute-work-threads/job-system.md)
* [Burst documentation](/engine/7000.0/manual/programming-environment/script-compilation/burst.md)