--- a
+++ b/docs/source/documentation.rst
@@ -0,0 +1,25 @@
+.. _documentation:
+
+Documentation
+================================================================================
+This page discusses the core API and built-in extensions for DOSMA.
+
+To learn more about what scans and tissues are supported, see the pages below:
+
+.. toctree::
+   :maxdepth: 1
+   :titlesonly:
+
+   core_api
+   scans
+   tissues
+   models
+   utils_api
+
+For a brief overview of DOSMA command-line practices and examples, see :ref:`Command Line Usage <usage-cli>`.
+
+To inspect the source code and corresponding documentation, use the following:
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`