diff --git a/4_experiments/3_packaging_and_distribution/password_generator/password_generator.csproj b/4_experiments/3_packaging_and_distribution/password_generator/password_generator.csproj
index d310cd0..553c23b 100644
--- a/4_experiments/3_packaging_and_distribution/password_generator/password_generator.csproj
+++ b/4_experiments/3_packaging_and_distribution/password_generator/password_generator.csproj
@@ -7,8 +7,9 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <!-- Packages live in this section of the project definition -->
   <ItemGroup>
     <PackageReference Include="PasswordGenerator" Version="2.1.0" />
   </ItemGroup>
 
-</Project>
+</Project>
\ No newline at end of file
diff --git a/ecosystem/data/database/4_experiments/entity_framework_core/0_entity_framework_core.txt b/ecosystem/database/1_core_language/0_entity_framework_core.txt
similarity index 100%
rename from ecosystem/data/database/4_experiments/entity_framework_core/0_entity_framework_core.txt
rename to ecosystem/database/1_core_language/0_entity_framework_core.txt
diff --git a/ecosystem/data/database/0_sqlclient.txt b/ecosystem/database/1_core_language/1_sqlclient.txt
similarity index 100%
rename from ecosystem/data/database/0_sqlclient.txt
rename to ecosystem/database/1_core_language/1_sqlclient.txt
diff --git a/ecosystem/data/database/4_experiments/entity_framework_core/setup.sh b/ecosystem/database/1_core_language/setup.sh
similarity index 100%
rename from ecosystem/data/database/4_experiments/entity_framework_core/setup.sh
rename to ecosystem/database/1_core_language/setup.sh
diff --git a/ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/.tool-versions b/ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/.tool-versions
similarity index 100%
rename from ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/.tool-versions
rename to ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/.tool-versions
diff --git a/ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop.slnx b/ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop.slnx
similarity index 100%
rename from ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop.slnx
rename to ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop.slnx
diff --git a/ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/Program.cs b/ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/Program.cs
similarity index 100%
rename from ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/Program.cs
rename to ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/Program.cs
diff --git a/ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/pizza_shop.csproj b/ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/pizza_shop.csproj
similarity index 100%
rename from ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/pizza_shop.csproj
rename to ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/pizza_shop.csproj
diff --git a/ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/src/Data/PizzaShopContext.cs b/ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/src/Data/PizzaShopContext.cs
similarity index 100%
rename from ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/src/Data/PizzaShopContext.cs
rename to ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/src/Data/PizzaShopContext.cs
diff --git a/ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/src/Models/Customer.cs b/ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/src/Models/Customer.cs
similarity index 100%
rename from ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/src/Models/Customer.cs
rename to ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/src/Models/Customer.cs
diff --git a/ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/src/Models/Order.cs b/ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/src/Models/Order.cs
similarity index 100%
rename from ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/src/Models/Order.cs
rename to ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/src/Models/Order.cs
diff --git a/ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/src/Models/OrderDetail.cs b/ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/src/Models/OrderDetail.cs
similarity index 100%
rename from ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/src/Models/OrderDetail.cs
rename to ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/src/Models/OrderDetail.cs
diff --git a/ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/src/Models/Product.cs b/ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/src/Models/Product.cs
similarity index 100%
rename from ecosystem/data/database/4_experiments/entity_framework_core/pizza_shop/pizza_shop/src/Models/Product.cs
rename to ecosystem/database/4_experiments/4_applications/entity_framework_core/pizza_shop/pizza_shop/src/Models/Product.cs
diff --git a/todo.txt b/todo.txt
index beb96c8..033d828 100644
--- a/todo.txt
+++ b/todo.txt
@@ -65,4 +65,4 @@ SQR3 legend:
     ***: R1 visit complete
     ****: R2 visit complete
     *****: R3 visit complete
-==============================================================================================
\ No newline at end of file
+==============================================================================================