diff --git a/README.md b/README.md
index 76205d9..1e8c055 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,16 @@
 # IOSTraining
+**1. Notification**
++ NSNotification
++ Local Notification
++ Push Notification (APNS)
+
+**2. SQLite**
+
+**3. Core Data**
+
+Ref:
++ [Techmaster - Truyền dữ liệu trong Swift với NSNotification](https://techmaster.vn/posts/34188/truyen-du-lieu-trong-swfit-voi-nsnotification)
++ [Viblo - IOS Local Notifications](https://viblo.asia/p/ios-local-notifications-YAQrMJxEv40E)
++ [Viblo - Build và test app sử dụng Apple Push Notification Service (APNs)](https://viblo.asia/p/build-va-test-app-su-dung-apple-push-notification-service-apns-bWrZneVbKxw)
+ + [Youtube - Lập trình iOS: Cơ sở dữ liệu SQLite](https://www.youtube.com/watch?v=xhDo1AekVx4&list=PLzrVYRai0riRb82xM0WPWRVp8lXkY1WKw)
+ + [Youtube - Lập trình iOS: Core Data](https://www.youtube.com/watch?v=IVP1NszljPQ&list=PLzrVYRai0riT282k1T3NfZALnZufpQpjP)