diff --git a/2-5-serverless-monitor.md b/2-5-serverless-monitor.md
new file mode 100644
index 0000000..63061d0
--- /dev/null
+++ b/2-5-serverless-monitor.md
@@ -0,0 +1,28 @@
+# Server-less applications and monitor systems
+
+## Server-less applications
+
+- Definition: run app without having to provision and maintain any server
+    - It actually uses server under the hood, but is automatically managed based
+      on the application you provided, without anything else explicitly stated.
+- Examples:
+    - AWS API Gateway
+    - AWS Lambda
+    - AWS SQS
+    - AWS SNS
+
+## Monitoring systems
+
+- Reason of Monitoring: HW, SW, data, and more need to be monitored, so failures
+  and security issues can be addressed in reasonable time.
+- Implementation for cloud systems: monitoring systems, to track faults and user
+  log info for security audits.
+- Helps to trouble shoot, administer and make decisions.
+- Examples:
+    - Ganglia
+    - Nagios
+    - Rackspace Cloud Monitoring
+    - Amazon CloudWatch: monitoring system for AWS infrastructure, provide
+      monitor data for application, and ge a overview of operations
+    - AWS CloudTrail: enable governance, compliance, autiding to AWS account,
+      monitors API calls