diff --git a/STOContracts/StorageContracts/ICarPartStorage.cs b/STOContracts/StorageContracts/ICarPartStorage.cs
new file mode 100644
index 0000000..be8eabe
--- /dev/null
+++ b/STOContracts/StorageContracts/ICarPartStorage.cs
@@ -0,0 +1,21 @@
+using STOContracts.BindingModels;
+using STOContracts.SearchModels;
+using STOContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace STOContracts.StorageContracts
+{
+    public interface ICarPartStorage
+    {
+        List<CarPartViewModel> GetFullList();
+        List<CarPartViewModel> GetFilteredList(CarPartSearchModel model);
+        CarPartViewModel? GetElement(CarPartSearchModel model);
+        CarPartViewModel? Insert(CarPartBindingModel model);
+        CarPartViewModel? Update(CarPartBindingModel model);
+        CarPartViewModel? Delete(CarPartBindingModel model);
+    }
+}
diff --git a/STOContracts/StorageContracts/ICarStorage.cs b/STOContracts/StorageContracts/ICarStorage.cs
new file mode 100644
index 0000000..58226a3
--- /dev/null
+++ b/STOContracts/StorageContracts/ICarStorage.cs
@@ -0,0 +1,21 @@
+using STOContracts.BindingModels;
+using STOContracts.SearchModels;
+using STOContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace STOContracts.StorageContracts
+{
+    public interface ICarStorage
+    {
+        List<CarViewModel> GetFullList();
+        List<CarViewModel> GetFilteredList(CarSearchModel model);
+        CarViewModel? GetElement(CarSearchModel model);
+        CarViewModel? Insert(CarBindingModel model);
+        CarViewModel? Update(CarBindingModel model);
+        CarViewModel? Delete(CarBindingModel model);
+    }
+}
diff --git a/STOContracts/StorageContracts/IClientStorage.cs b/STOContracts/StorageContracts/IClientStorage.cs
new file mode 100644
index 0000000..7902e33
--- /dev/null
+++ b/STOContracts/StorageContracts/IClientStorage.cs
@@ -0,0 +1,22 @@
+using STOContracts.BindingModels;
+using STOContracts.SearchModels;
+using STOContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace STOContracts.StorageContracts
+{
+    public interface IClientStorage
+    {
+        List<ClientViewModel> GetFullList();
+        List<ClientViewModel> GetFilteredList(ClientSearchModel model);
+        ClientViewModel? GetElement(ClientSearchModel model);
+        ClientViewModel? Insert(ClientBindingModel model);
+        ClientViewModel? Update(ClientBindingModel model);
+        ClientViewModel? Delete(ClientBindingModel model);
+    }
+}
+
diff --git a/STOContracts/StorageContracts/IServiceStorage.cs b/STOContracts/StorageContracts/IServiceStorage.cs
new file mode 100644
index 0000000..489b15a
--- /dev/null
+++ b/STOContracts/StorageContracts/IServiceStorage.cs
@@ -0,0 +1,21 @@
+using STOContracts.BindingModels;
+using STOContracts.SearchModels;
+using STOContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace STOContracts.StorageContracts
+{
+    public interface IServiceStorage
+    {
+        List<ServiceViewModel> GetFullList();
+        List<ServiceViewModel> GetFilteredList(ServiceSearchModel model);
+        ServiceViewModel? GetElement(ServiceSearchModel model);
+        ServiceViewModel? Insert(ServiceBindingModel model);
+        ServiceViewModel? Update(ServiceBindingModel model);
+        ServiceViewModel? Delete(ServiceBindingModel model);
+    }
+}
diff --git a/STOContracts/StorageContracts/ITechnicalWorkStorage.cs b/STOContracts/StorageContracts/ITechnicalWorkStorage.cs
new file mode 100644
index 0000000..276a2d0
--- /dev/null
+++ b/STOContracts/StorageContracts/ITechnicalWorkStorage.cs
@@ -0,0 +1,16 @@
+using STOContracts.BindingModels;
+using STOContracts.SearchModels;
+using STOContracts.ViewModels;
+
+namespace STOContracts.StoragesContracts
+{
+    public interface ITechnicalWorkStorage
+    {
+        List<TechnicalWorkViewModel> GetFullList();
+        List<TechnicalWorkViewModel> GetFilteredList(TechnicalWorkSearchModel model);
+        TechnicalWorkViewModel? GetElement(TechnicalWorkSearchModel model);
+        TechnicalWorkViewModel? Insert(TechnicalWorkBindingModel model);
+        TechnicalWorkViewModel? Update(TechnicalWorkBindingModel model);
+        TechnicalWorkViewModel? Delete(TechnicalWorkBindingModel model);
+    }
+}
\ No newline at end of file