diff --git a/architecture.py b/architecture.py
new file mode 100644
index 0000000..38e1317
--- /dev/null
+++ b/architecture.py
@@ -0,0 +1,20 @@
+import os
+
+import distribution
+
+
+class Architecture:
+    def __init__(self, name):
+        self.name = name
+        self.distribution = distribution.Distribution(self)
+        # TODO subsystems
+        self.subsystems = {}
+
+    def __str__(self):
+        lines = [
+            f'Name: {self.name}',
+        ]
+        return os.linesep.join(lines)
+
+X86 = Architecture('x86_64')
+I86 = Architecture('i686')
diff --git a/distribution.py b/distribution.py
new file mode 100644
index 0000000..4b9303d
--- /dev/null
+++ b/distribution.py
@@ -0,0 +1,12 @@
+import os
+
+
+class Distribution:
+    def __init__(self, architecture):
+        self.architecture = architecture
+
+    def __str__(self):
+        lines = [
+            f'Architecture: {self.architecture.name}',
+        ]
+        return os.linesep.join(lines)
diff --git a/subsystem.py b/subsystem.py
new file mode 100644
index 0000000..90421e7
--- /dev/null
+++ b/subsystem.py
@@ -0,0 +1,16 @@
+import os
+
+MAIN = 'msys'
+
+
+class SubSystem:
+    def __init__(self, architecture):
+        self.architecture = architecture
+        self.name = name
+
+    def __str__(self):
+        lines = [
+            f'Architecture: {self.architecture.name}',
+            f'        Name: {self.name}',
+        ]
+        return os.linesep.join(lines)