diff --git a/rwx/os/__init__.py b/rwx/os/__init__.py
index 75a0bc9..27c1748 100644
--- a/rwx/os/__init__.py
+++ b/rwx/os/__init__.py
@@ -8,7 +8,12 @@ from .debian import Debian
 
 
 def from_path(path: Path) -> OS:
-    """Initialize from an already existing path."""
+    """Initialize from an already existing path.
+
+    :param path: source root directory
+    :type path: Path
+    :rtype: OS
+    """
     return Debian(path)
 
 
diff --git a/rwx/os/abstract.py b/rwx/os/abstract.py
index f4837fc..77f9cb1 100644
--- a/rwx/os/abstract.py
+++ b/rwx/os/abstract.py
@@ -10,10 +10,17 @@ class OS(Class, ABC):
     """Operating System."""
 
     def __init__(self, path: Path) -> None:
-        """Set root."""
+        """Set root.
+
+        :param path: root directory
+        :type path: Path
+        """
         self.root = path
         self.name = self.get_name()
 
     @abstractmethod
     def get_name(self) -> str:
-        """Return mandatory name."""
+        """Return mandatory name.
+
+        :rtype: str
+        """