diff --git a/Contracts/BindingModels/SupplyBindingModel.cs b/Contracts/BindingModels/SupplyBindingModel.cs
index 9611abc..9c2e2f1 100644
--- a/Contracts/BindingModels/SupplyBindingModel.cs
+++ b/Contracts/BindingModels/SupplyBindingModel.cs
@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 
 namespace Contracts.BindingModels
 {
-    internal class SupplyBindingModel : ISupply
+    public class SupplyBindingModel : ISupply
     {
         public Guid Id { get; set; }
         public string Name { get; set; } = string.Empty;
diff --git a/Contracts/BusinessLogicContracts/IProductLogic.cs b/Contracts/BusinessLogicContracts/IProductLogic.cs
index b19b8e8..4711e97 100644
--- a/Contracts/BusinessLogicContracts/IProductLogic.cs
+++ b/Contracts/BusinessLogicContracts/IProductLogic.cs
@@ -1,4 +1,6 @@
 using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -12,6 +14,7 @@ namespace Contracts.BusinessLogicContracts
         bool Create(ProductBindingModel model);
         bool Update(ProductBindingModel model);
         bool Delete(ProductBindingModel model);
-
+        List<ProductViewModel>? ReadList(ProductSearchModel? model);
+        ProductViewModel? ReadElement(ProductSearchModel model);
     }
 }
diff --git a/Contracts/BusinessLogicContracts/ISupplierLogic.cs b/Contracts/BusinessLogicContracts/ISupplierLogic.cs
new file mode 100644
index 0000000..24ed51c
--- /dev/null
+++ b/Contracts/BusinessLogicContracts/ISupplierLogic.cs
@@ -0,0 +1,20 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BusinessLogicContracts
+{
+    public interface ISupplierLogic
+    {
+        List<SupplierViewModel>? ReadList(SupplierSearchModel? model);
+        SupplierViewModel? ReadElement(SupplierSearchModel model);
+        bool Create(SupplierBindingModel model);
+        bool Update(SupplierBindingModel model);
+        bool Delete(SupplierBindingModel model);
+    }
+}
diff --git a/Contracts/BusinessLogicContracts/ISupplyDocLogic.cs b/Contracts/BusinessLogicContracts/ISupplyDocLogic.cs
new file mode 100644
index 0000000..3d441c1
--- /dev/null
+++ b/Contracts/BusinessLogicContracts/ISupplyDocLogic.cs
@@ -0,0 +1,20 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BusinessLogicContracts
+{
+    public interface ISupplyDocLogic
+    {
+        List<SupplyDocViewModel>? ReadList(SupplyDocSearchModel? model);
+        SupplyDocViewModel? ReadElement(SupplyDocSearchModel model);
+        bool Create(SupplyDocBindingModel model);
+        bool Update(SupplyDocBindingModel model);
+        bool Delete(SupplyDocBindingModel model);
+    }
+}
diff --git a/Contracts/BusinessLogicContracts/ISupplyLogic.cs b/Contracts/BusinessLogicContracts/ISupplyLogic.cs
new file mode 100644
index 0000000..d21ff5d
--- /dev/null
+++ b/Contracts/BusinessLogicContracts/ISupplyLogic.cs
@@ -0,0 +1,20 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.BusinessLogicContracts
+{
+    public interface ISupplyLogic
+    {
+        List<SupplyViewModel>? ReadList(SupplySearchModel? model);
+        SupplyViewModel? ReadElement(SupplySearchModel model);
+        bool Create(SupplyBindingModel model);
+        bool Update(SupplyBindingModel model);
+        bool Delete(SupplyBindingModel model);
+    }
+}
diff --git a/Contracts/StorageContracts/IProductStorage.cs b/Contracts/StorageContracts/IProductStorage.cs
index 49ce4e3..7d8e2bd 100644
--- a/Contracts/StorageContracts/IProductStorage.cs
+++ b/Contracts/StorageContracts/IProductStorage.cs
@@ -1,5 +1,6 @@
 using Contracts.BindingModels;
 using Contracts.SearchModels;
+using Contracts.ViewModels;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -10,14 +11,11 @@ namespace Contracts.StorageContracts
 {
 	public interface IProductStorage
 	{
-		ProductBindingModel? Insert(ProductBindingModel model);
-
-		IEnumerable<ProductBindingModel> GetList(ProductSearchModel? model);
-
-		ProductBindingModel? GetElement(ProductSearchModel model);
-
-		ProductBindingModel? Update(ProductBindingModel model);
-
-		ProductBindingModel? Delete(ProductSearchModel model);
-	}
+        List<ProductViewModel> GetFullList();
+        List<ProductViewModel> GetFilteredList(ProductSearchModel model);
+        ProductViewModel? GetElement(ProductSearchModel model);
+        ProductViewModel? Insert(ProductBindingModel model);
+        ProductViewModel? Update(ProductBindingModel model);
+        ProductViewModel? Delete(ProductBindingModel model);
+    }
 }
diff --git a/Contracts/StorageContracts/ISupplierStorage.cs b/Contracts/StorageContracts/ISupplierStorage.cs
new file mode 100644
index 0000000..dc2f1fe
--- /dev/null
+++ b/Contracts/StorageContracts/ISupplierStorage.cs
@@ -0,0 +1,21 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.StorageContracts
+{
+    public interface ISupplierStorage
+    {
+        List<SupplierViewModel> GetFullList();
+        List<SupplierViewModel> GetFilteredList(SupplierSearchModel model);
+        SupplierViewModel? GetElement(SupplierSearchModel model);
+        SupplierViewModel? Insert(SupplierBindingModel model);
+        SupplierViewModel? Update(SupplierBindingModel model);
+        SupplierViewModel? Delete(SupplierBindingModel model);
+    }
+}
diff --git a/Contracts/StorageContracts/ISupplyDocStorage.cs b/Contracts/StorageContracts/ISupplyDocStorage.cs
new file mode 100644
index 0000000..d10ab0e
--- /dev/null
+++ b/Contracts/StorageContracts/ISupplyDocStorage.cs
@@ -0,0 +1,21 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.StorageContracts
+{
+    public interface ISupplyDocStorage
+    {
+        List<SupplyDocViewModel> GetFullList();
+        List<SupplyDocViewModel> GetFilteredList(SupplyDocSearchModel model);
+        SupplyDocViewModel? GetElement(SupplyDocSearchModel model);
+        SupplyDocViewModel? Insert(SupplyDocBindingModel model);
+        SupplyDocViewModel? Update(SupplyDocBindingModel model);
+        SupplyDocViewModel? Delete(SupplyDocBindingModel model);
+    }
+}
diff --git a/Contracts/StorageContracts/ISupplyStorage.cs b/Contracts/StorageContracts/ISupplyStorage.cs
new file mode 100644
index 0000000..2f81c46
--- /dev/null
+++ b/Contracts/StorageContracts/ISupplyStorage.cs
@@ -0,0 +1,21 @@
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.StorageContracts
+{
+    public interface ISupplyStorage
+    {
+        List<SupplyViewModel> GetFullList();
+        List<SupplyViewModel> GetFilteredList(SupplySearchModel model);
+        SupplyViewModel? GetElement(SupplySearchModel model);
+        SupplyViewModel? Insert(SupplyBindingModel model);
+        SupplyViewModel? Update(SupplyBindingModel model);
+        SupplyViewModel? Delete(SupplyBindingModel model);
+    }
+}