diff --git a/docs/glossary.rst b/docs/glossary.rst
new file mode 100644
index 00000000..a3d16c35
--- /dev/null
+++ b/docs/glossary.rst
@@ -0,0 +1,11 @@
+Glossary
+========
+
+.. glossary::
+
+   Sphinx
+      Sphinx is a tool that makes it easy to create intelligent and beautiful documentation. It was originally created for the Python documentation, and it has excellent facilities for the documentation of software projects in a range of languages.
+
+   reStructuredText
+      An easy-to-read, what-you-see-is-what-you-get plaintext markup syntax and
+      parser system.     
diff --git a/docs/index.rst b/docs/index.rst
index 855445f3..068189bc 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -24,6 +24,7 @@ Welcome to Proxmox Backup's documentation!
    :caption: Appendix
 
    command-syntax.rst
+   glossary.rst
    generated-index.rst
    search-page.rst
 
diff --git a/docs/introduction.rst b/docs/introduction.rst
index f0d94064..c48ca9d1 100644
--- a/docs/introduction.rst
+++ b/docs/introduction.rst
@@ -1,6 +1,8 @@
 Introduction
 ============
 
+This documentationm is written in :term:`reStructuredText` and formatted with :term:`Sphinx`.
+
 this is a test
 
 Why Backup?