diff --git a/surfaces/__init__.py b/surfaces/__init__.py
index e6bcc8a..943edb0 100644
--- a/surfaces/__init__.py
+++ b/surfaces/__init__.py
@@ -4,3 +4,12 @@
 
 __version__ = "0.0.7"
 __license__ = "MIT"
+
+from .mathematical_functions import mathematical_functions
+from .machine_learning_functions import machine_learning_functions
+
+
+__all__ = [
+    "mathematical_functions",
+    "machine_learning_functions",
+]
diff --git a/surfaces/machine_learning_functions/__init__.py b/surfaces/machine_learning_functions/__init__.py
index a7472ec..8ffe851 100644
--- a/surfaces/machine_learning_functions/__init__.py
+++ b/surfaces/machine_learning_functions/__init__.py
@@ -15,7 +15,7 @@
     "KNeighborsRegressorFunction",
 ]
 
-all = [
+machine_learning_functions = [
     KNeighborsClassifierFunction,
     GradientBoostingRegressorFunction,
     KNeighborsRegressorFunction,
diff --git a/surfaces/mathematical_functions/__init__.py b/surfaces/mathematical_functions/__init__.py
index 5951b2e..7e2fb88 100644
--- a/surfaces/mathematical_functions/__init__.py
+++ b/surfaces/mathematical_functions/__init__.py
@@ -55,7 +55,7 @@
     "ThreeHumpCamelFunction",
 ]
 
-all = [
+mathematical_functions = [
     AckleyFunction,
     BealeFunction,
     BoothFunction,