1.. _osal:
2
3OS Abstraction
4##############
5
6OS abstraction layers (OSAL) provide wrapper function APIs that
7encapsulate common system functions offered by any operating system.
8These APIs make it easier and quicker to develop for, and port code to
9multiple software and hardware platforms.
10
11These sections describe the software and hardware abstraction layers
12supported by the Zephyr RTOS.
13
14.. toctree::
15   :maxdepth: 1
16
17   posix/index.rst
18   cmsis_rtos_v1.rst
19   cmsis_rtos_v2.rst
20