diff --git a/Arrangement_on_surface_2/todo b/Arrangement_on_surface_2/TODO
similarity index 100%
rename from Arrangement_on_surface_2/todo
rename to Arrangement_on_surface_2/TODO
diff --git a/Arrangement_on_surface_2/test/Arrangement_on_surface_2/todo b/Arrangement_on_surface_2/test/Arrangement_on_surface_2/TODO
similarity index 100%
rename from Arrangement_on_surface_2/test/Arrangement_on_surface_2/todo
rename to Arrangement_on_surface_2/test/Arrangement_on_surface_2/TODO
diff --git a/Inscribed_areas/todo.txt b/Inscribed_areas/TODO
similarity index 100%
rename from Inscribed_areas/todo.txt
rename to Inscribed_areas/TODO
diff --git a/Kinetic_data_structures/todo b/Kinetic_data_structures/TODO
similarity index 100%
rename from Kinetic_data_structures/todo
rename to Kinetic_data_structures/TODO
diff --git a/Polyhedron/demo/Polyhedron/TODO.txt b/Polyhedron/demo/Polyhedron/TODO
similarity index 100%
rename from Polyhedron/demo/Polyhedron/TODO.txt
rename to Polyhedron/demo/Polyhedron/TODO
diff --git a/Skin_surface_3/TODO.txt b/Skin_surface_3/TODO
similarity index 100%
rename from Skin_surface_3/TODO.txt
rename to Skin_surface_3/TODO
diff --git a/Spatial_searching/TODO.txt b/Spatial_searching/TODO
similarity index 100%
rename from Spatial_searching/TODO.txt
rename to Spatial_searching/TODO