diff --git a/rwx/os/__init__.py b/rwx/os/__init__.py
index 3dfa782..75a0bc9 100644
--- a/rwx/os/__init__.py
+++ b/rwx/os/__init__.py
@@ -1,30 +1,15 @@
 """Control Operating Systems."""
 
-from __future__ import annotations
-
-from abc import ABC, abstractmethod
 from os import sep
 from pathlib import Path
 
+from .abstract import OS
 from .debian import Debian
 
 
-class OS(ABC):
-    """Operating System."""
-
-    def __init__(self, path: Path) -> None:
-        """Set root."""
-        self.root = path
-        self.name = self.get_name()
-
-    @abstractmethod
-    def get_name(self) -> str:
-        """Return mandatory name."""
-
-    @staticmethod
-    def from_path(path: Path) -> OS:
-        """Initialize from an already existing path."""
-        return Debian(path)
+def from_path(path: Path) -> OS:
+    """Initialize from an already existing path."""
+    return Debian(path)
 
 
-os = OS.from_path(Path(sep))
+up = from_path(Path(sep))
diff --git a/rwx/os/abstract.py b/rwx/os/abstract.py
new file mode 100644
index 0000000..2d86f7e
--- /dev/null
+++ b/rwx/os/abstract.py
@@ -0,0 +1,17 @@
+"""Abstract Operating System."""
+
+from abc import ABC, abstractmethod
+from pathlib import Path
+
+
+class OS(ABC):
+    """Operating System."""
+
+    def __init__(self, path: Path) -> None:
+        """Set root."""
+        self.root = path
+        self.name = self.get_name()
+
+    @abstractmethod
+    def get_name(self) -> str:
+        """Return mandatory name."""
diff --git a/rwx/os/debian.py b/rwx/os/debian.py
index dbaaabb..98c8928 100644
--- a/rwx/os/debian.py
+++ b/rwx/os/debian.py
@@ -1,6 +1,6 @@
 """Debian operating system."""
 
-from . import OS
+from .abstract import OS
 
 
 class Debian(OS):