diff --git a/api/__init__.py b/api/__init__.py
index a9088e5..07c3f12 100644
--- a/api/__init__.py
+++ b/api/__init__.py
@@ -144,9 +144,9 @@ from .s32_region import get_region_schema, get_region, set_region, add_region, d
 
 from .s32_water_distribution import calculate_demand_to_nodes, calculate_demand_to_region, calculate_demand_to_network
 
-from .s33_district_metering_area import PARTITION_TYPE_RB, PARTITION_TYPE_KWAY
-from .s33_district_metering_area import calculate_district_metering_area_for_nodes, calculate_district_metering_area_for_region, calculate_district_metering_area_for_network
+from .s33_dma import PARTITION_TYPE_RB, PARTITION_TYPE_KWAY
+from .s33_dma import calculate_district_metering_area_for_nodes, calculate_district_metering_area_for_region, calculate_district_metering_area_for_network
 
-from .s34_service_area import calculate_service_area
+from .s34_sa import calculate_service_area
 
-from .s35_virtual_district import calculate_virtual_district
+from .s35_vd import calculate_virtual_district
diff --git a/api/s33_district_metering_area.py b/api/s33_dma.py
similarity index 100%
rename from api/s33_district_metering_area.py
rename to api/s33_dma.py
diff --git a/api/s34_service_area.py b/api/s34_sa.py
similarity index 100%
rename from api/s34_service_area.py
rename to api/s34_sa.py
diff --git a/api/s35_virtual_district.py b/api/s35_vd.py
similarity index 100%
rename from api/s35_virtual_district.py
rename to api/s35_vd.py