diff --git a/STODataModels/ICarModel.cs b/STODataModels/ICarModel.cs
new file mode 100644
index 0000000..8d59da2
--- /dev/null
+++ b/STODataModels/ICarModel.cs
@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace STODataModels
+{
+    public  interface ICarModel: IId
+    {
+        public int Id { get; }
+
+        string CarNumber { get; }
+
+        string CarBrand { get;}
+
+        string CarModel { get;}
+        DateTime Year { get;}
+        int ClientId { get; }
+        Dictionary<int, (ITechnicalWorkModel, int)> CarTechnicalWorks { get;}
+    }
+}
diff --git a/STODataModels/ICarPartModel.cs b/STODataModels/ICarPartModel.cs
new file mode 100644
index 0000000..72e36cb
--- /dev/null
+++ b/STODataModels/ICarPartModel.cs
@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace STODataModels
+{
+    public interface ICarPartModel: IId
+    {
+        int Id { get;}
+        string CarPartName { get; }
+        double Cost { get; }
+    }
+}
diff --git a/STODataModels/IClientModel.cs b/STODataModels/IClientModel.cs
new file mode 100644
index 0000000..c3b5196
--- /dev/null
+++ b/STODataModels/IClientModel.cs
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace STODataModels
+{
+    public interface IClientModel: IId
+    {
+        int Id { get;}
+        string ClientFIO { get; }
+        string Email { get;}
+        string Password { get; }
+    }
+}
diff --git a/STODataModels/IId.cs b/STODataModels/IId.cs
new file mode 100644
index 0000000..30068f7
--- /dev/null
+++ b/STODataModels/IId.cs
@@ -0,0 +1,8 @@
+namespace STODataModels
+{
+
+    public interface IId
+    {
+        int Id { get; }
+    }
+}
diff --git a/STODataModels/IServiceModel.cs b/STODataModels/IServiceModel.cs
new file mode 100644
index 0000000..96f711f
--- /dev/null
+++ b/STODataModels/IServiceModel.cs
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace STODataModels
+{
+    public interface IServiceModel: IId
+    {
+        int Id { get; }
+        string Name { get; }
+        int CarId { get; }
+        int ClientId { get; }
+    }
+}