diff --git a/src/CourseRegistrationStarter/RegistrationSystem.java b/src/CourseRegistrationStarter/RegistrationSystem.java
index 934f222..02cb5ea 100644
--- a/src/CourseRegistrationStarter/RegistrationSystem.java
+++ b/src/CourseRegistrationStarter/RegistrationSystem.java
@@ -1,24 +1,54 @@
 package CourseRegistrationStarter;
 import java.util.ArrayList;
 
-public class RegistrationSystem {
+public class RegistrationSystem
+{
     private ArrayList<Course> courses;
 
     public RegistrationSystem() {
         courses = new ArrayList<>();
     }
 
-    public void addCourseToSystem(Course c) {
-        // TODO: Add the course to the system
+    public void addCourseToSystem(Course c)
+    {
+        courses.add(c);
     }
 
-    public Course findCourseByCode(String code) {
-        // TODO: Search for a course by course code
-        // Return the matching course if found, otherwise return null
+    public Course findCourseByCode(String code)
+    {
+        if(courses.isEmpty())
+        {
+            System.out.println("NOTHING HAS FOUND !");
+            return null;
+        }
+        else
+        {
+            for(int i = 0; i < courses.size(); i++)
+            {
+                Course c = courses.get(i);
+                if(code.equals(c.getCourseCode()))
+                {
+                    return c;
+                }
+            }
+        }
+        System.out.println("NOTHING HAS FOUND !");
         return null;
     }
 
-    public void showAllCourses() {
-        // TODO: Print all courses in the system
+    public void showAllCourses()
+    {
+        if(courses.isEmpty())
+        {
+            System.out.println("NOTHING HAS FOUND !");
+        }
+
+        for(int i = 0; i < courses.size(); i++)
+        {
+            Course c = courses.get(i);
+            System.out.println("Course "+ (i + 1) + " : " + c.getCourseName()
+                    + " | code : " + c.getCourseCode()
+                    + " | cpacity : " + c.getCapacity());
+        }
     }
-}
+}
\ No newline at end of file