diff --git a/docs/source/mayavi/auto/example_julia_set_decimation.rst b/docs/source/mayavi/auto/example_julia_set_decimation.rst
index 90a83b604..1f2e85077 100644
--- a/docs/source/mayavi/auto/example_julia_set_decimation.rst
+++ b/docs/source/mayavi/auto/example_julia_set_decimation.rst
@@ -6,7 +6,7 @@ Julia set decimation example
 --------------------------------------------------------------------
 
 
-The Julia set, but with a decimated mesh: unecessary triangles due to the
+The Julia set, but with a decimated mesh: unnecessary triangles due to the
 initial grid and not matching the geometry of the Julia set
 are removed.
 
diff --git a/docs/source/mayavi/auto/example_multiple_engines.rst b/docs/source/mayavi/auto/example_multiple_engines.rst
index d2e9c0ddb..cb9b98fee 100644
--- a/docs/source/mayavi/auto/example_multiple_engines.rst
+++ b/docs/source/mayavi/auto/example_multiple_engines.rst
@@ -15,7 +15,7 @@ This example shows how to explicitly set the engine for an embedded
 scene.
 
 To define default arguments, it makes use of the Traits initialization
-style, rather than overridding the __init__.
+style, rather than overriding the __init__.
 
 
 **Python source code:** :download:`multiple_engines.py`
diff --git a/docs/source/mayavi/auto/examples.rst b/docs/source/mayavi/auto/examples.rst
index c40884569..600e41578 100644
--- a/docs/source/mayavi/auto/examples.rst
+++ b/docs/source/mayavi/auto/examples.rst
@@ -238,7 +238,7 @@ Advanced mlab examples
 
 |0010|  :ref:`example_julia_set_decimation`
          The Julia set, but with a decimated
-         mesh: unecessary triangles due to the
+         mesh: unnecessary triangles due to the
          initial grid and not matching the
          geometry of the Julia set are removed.
 
diff --git a/docs/source/mayavi/auto/julia_set_decimation.py b/docs/source/mayavi/auto/julia_set_decimation.py
index 4edccc214..f57b2d1b7 100644
--- a/docs/source/mayavi/auto/julia_set_decimation.py
+++ b/docs/source/mayavi/auto/julia_set_decimation.py
@@ -1,5 +1,5 @@
 """
-The Julia set, but with a decimated mesh: unecessary triangles due to the
+The Julia set, but with a decimated mesh: unnecessary triangles due to the
 initial grid and not matching the geometry of the Julia set
 are removed.
 
diff --git a/docs/source/mayavi/auto/multiple_engines.py b/docs/source/mayavi/auto/multiple_engines.py
index 3e95f5f36..8e316cf00 100644
--- a/docs/source/mayavi/auto/multiple_engines.py
+++ b/docs/source/mayavi/auto/multiple_engines.py
@@ -8,7 +8,7 @@
 scene.
 
 To define default arguments, it makes use of the Traits initialization
-style, rather than overridding the __init__.
+style, rather than overriding the __init__.
 """
 # Author:  Gael Varoquaux <gael _dot_ varoquaux _at_ normalesup _dot_ org>
 # Copyright (c) 2009, Enthought, Inc.
diff --git a/docs/source/mayavi/auto/volume_slicer_advanced.py b/docs/source/mayavi/auto/volume_slicer_advanced.py
index 3cf6d7018..d9fd0d286 100644
--- a/docs/source/mayavi/auto/volume_slicer_advanced.py
+++ b/docs/source/mayavi/auto/volume_slicer_advanced.py
@@ -225,7 +225,7 @@ def update_position(self):
         """ Update the position of the cursors on each side view, as well
             as the image_plane_widgets in the 3D view.
         """
-        # First disable rendering in all scenes to avoid unecessary
+        # First disable rendering in all scenes to avoid unnecessary
         # renderings
         self.disable_render = True
 
diff --git a/examples/mayavi/interactive/multiple_engines.py b/examples/mayavi/interactive/multiple_engines.py
index 3e95f5f36..8e316cf00 100644
--- a/examples/mayavi/interactive/multiple_engines.py
+++ b/examples/mayavi/interactive/multiple_engines.py
@@ -8,7 +8,7 @@
 scene.
 
 To define default arguments, it makes use of the Traits initialization
-style, rather than overridding the __init__.
+style, rather than overriding the __init__.
 """
 # Author:  Gael Varoquaux <gael _dot_ varoquaux _at_ normalesup _dot_ org>
 # Copyright (c) 2009, Enthought, Inc.
diff --git a/examples/mayavi/interactive/volume_slicer_advanced.py b/examples/mayavi/interactive/volume_slicer_advanced.py
index f1665e64e..03b7ef6b8 100644
--- a/examples/mayavi/interactive/volume_slicer_advanced.py
+++ b/examples/mayavi/interactive/volume_slicer_advanced.py
@@ -225,7 +225,7 @@ def update_position(self):
         """ Update the position of the cursors on each side view, as well
             as the image_plane_widgets in the 3D view.
         """
-        # First disable rendering in all scenes to avoid unecessary
+        # First disable rendering in all scenes to avoid unnecessary
         # renderings
         self.disable_render = True
 
diff --git a/examples/mayavi/mlab/julia_set_decimation.py b/examples/mayavi/mlab/julia_set_decimation.py
index 4edccc214..f57b2d1b7 100644
--- a/examples/mayavi/mlab/julia_set_decimation.py
+++ b/examples/mayavi/mlab/julia_set_decimation.py
@@ -1,5 +1,5 @@
 """
-The Julia set, but with a decimated mesh: unecessary triangles due to the
+The Julia set, but with a decimated mesh: unnecessary triangles due to the
 initial grid and not matching the geometry of the Julia set
 are removed.
 
diff --git a/mayavi/core/mouse_pick_dispatcher.py b/mayavi/core/mouse_pick_dispatcher.py
index d8ddc4cb6..55ff816d4 100644
--- a/mayavi/core/mouse_pick_dispatcher.py
+++ b/mayavi/core/mouse_pick_dispatcher.py
@@ -118,7 +118,7 @@ def callback_added(self, item):
 
 
     def callback_removed(self, item):
-        """ Clean up the unecessary VTK callbacks.
+        """ Clean up the unnecessary VTK callbacks.
         """
         callback, type, button = item