diff --git a/FurnitureFactory/FurnitureContracts/BindingModels/HeadsetModuleModel.cs b/FurnitureFactory/FurnitureContracts/BindingModels/HeadsetModuleBindingModel.cs
similarity index 85%
rename from FurnitureFactory/FurnitureContracts/BindingModels/HeadsetModuleModel.cs
rename to FurnitureFactory/FurnitureContracts/BindingModels/HeadsetModuleBindingModel.cs
index 9c2b8cc..67fe0d6 100644
--- a/FurnitureFactory/FurnitureContracts/BindingModels/HeadsetModuleModel.cs
+++ b/FurnitureFactory/FurnitureContracts/BindingModels/HeadsetModuleBindingModel.cs
@@ -7,7 +7,7 @@ using System.Threading.Tasks;
 
 namespace FurnitureContracts.BindingModels
 {
-    internal class HeadsetModuleModel : IHeadsetModuleModel
+    internal class HeadsetModuleBindingModel : IHeadsetModuleModel
     {
         public string Style { get; set; } = string.Empty;
 
diff --git a/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IFurnitureLogic.cs b/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IFurnitureLogic.cs
new file mode 100644
index 0000000..83c6d07
--- /dev/null
+++ b/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IFurnitureLogic.cs
@@ -0,0 +1,20 @@
+using FurnitureContracts.BindingModels;
+using FurnitureContracts.SearchModels;
+using FurnitureContracts.ViewModel;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FurnitureContracts.BusinessLogicsContracts
+{
+    interface IFurnitureLogic
+    {
+        List<FurnitureViewModel>? ReadList(FurnitureSearchModel? model);
+        FurnitureViewModel? ReadElement(FurnitureSearchModel model);
+        bool Create(FurnitureBindingModel model);
+        bool Update(FurnitureBindingModel model);
+        bool Delete(FurnitureBindingModel model);
+    }
+}
diff --git a/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IHeadsetModuleLogic.cs b/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IHeadsetModuleLogic.cs
new file mode 100644
index 0000000..fcc064b
--- /dev/null
+++ b/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IHeadsetModuleLogic.cs
@@ -0,0 +1,20 @@
+using FurnitureContracts.BindingModels;
+using FurnitureContracts.SearchModels;
+using FurnitureContracts.ViewModel;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FurnitureContracts.BusinessLogicsContracts
+{
+    internal interface IHeadsetModuleLogic
+    {
+        List<HeadsetModuleViewModel>? ReadList(HeadsetModuleSearchModel? model);
+        HeadsetModuleViewModel? ReadElement(HeadsetModuleSearchModel model);
+        bool Create(HeadsetModuleBindingModel model);
+        bool Update(HeadsetModuleBindingModel model);
+        bool Delete(HeadsetModuleBindingModel model);
+    }
+}
diff --git a/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IMaterialLogic.cs b/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IMaterialLogic.cs
new file mode 100644
index 0000000..1712c95
--- /dev/null
+++ b/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IMaterialLogic.cs
@@ -0,0 +1,20 @@
+using FurnitureContracts.BindingModels;
+using FurnitureContracts.SearchModels;
+using FurnitureContracts.ViewModel;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FurnitureContracts.BusinessLogicsContracts
+{
+    interface IMaterialLogic
+    {
+        List<MaterialViewModel>? ReadList(MaterialSearchModel? model);
+        MaterialViewModel? ReadElement(MaterialSearchModel model);
+        bool Create(MaterialBindingModel model);
+        bool Update(MaterialBindingModel model);
+        bool Delete(MaterialBindingModel model);
+    }
+}
diff --git a/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IOrdersLogic.cs b/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IOrdersLogic.cs
index 8bd95b2..26136ad 100644
--- a/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IOrdersLogic.cs
+++ b/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IOrdersLogic.cs
@@ -4,7 +4,7 @@ using FurnitureContracts.ViewModel;
 
 namespace FurnitureContracts.BusinessLogicsContracts
 {
-    public class IOrdersLogic
+    interface IOrdersLogic
     {
         List<OrdersViewModel>? ReadList(OrderSearchModel? model);
         OrdersViewModel? ReadElement(OrderSearchModel model);
diff --git a/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IUserLogic.cs b/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IUserLogic.cs
new file mode 100644
index 0000000..e13c124
--- /dev/null
+++ b/FurnitureFactory/FurnitureContracts/BusinessLogicsContracts/IUserLogic.cs
@@ -0,0 +1,20 @@
+using FurnitureContracts.BindingModels;
+using FurnitureContracts.SearchModels;
+using FurnitureContracts.ViewModel;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FurnitureContracts.BusinessLogicsContracts
+{
+    interface IUserLogic
+    {
+        List<UserViewModel>? ReadList(UserSearchModel? model);
+        UserViewModel? ReadElement(UserSearchModel model);
+        bool Create(UserBindingModel model);
+        bool Update(UserBindingModel model);
+        bool Delete(UserBindingModel model);
+    }
+}