# Linear Containers library
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**Important**  <a name="archive-message"></a>
This is an archived version of the FreeRTOS User Guide for use with FreeRTOS release 202012.00. For the latest version of this document, see the [FreeRTOS User Guide](../../../latest/userguide/index.html).

The [FreeRTOS Linear Containers library](https://docs.amazonaws.cn/freertos/latest/lib-ref/c-sdk/linear_containers/index.html) defines linear data structures, including lists and queues, for you to use when developing embedded applications.

## API reference
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For a full API reference, see [Linear Containers C SDK API Reference](https://docs.amazonaws.cn/freertos/latest/lib-ref/c-sdk/linear_containers/index.html).