diff --git a/CloudComputing_Lab/modules/ROOT/pages/a.adoc b/CloudComputing_Lab/modules/ROOT/pages/a.adoc
index 796d84e..00a44a8 100644
--- a/CloudComputing_Lab/modules/ROOT/pages/a.adoc
+++ b/CloudComputing_Lab/modules/ROOT/pages/a.adoc
@@ -92,6 +92,12 @@ http://docs.swarmlab.io/SwarmLab-HowTos/swarmlab/docs/swarmlab/docs/hybrid/start
 
  Datacollector
 
+ The "data collector" is a lightweight microservice application that collect and sends metadata, collected from a system, such as an IoT network, distributed system, data center, etc to a storage system.
+
+    The data are transmitted, stored, and can be retrieved at any time.
+
+
+
 http://docs.swarmlab.io/SwarmLab-HowTos/swarmlab/docs/swarmlab/docs/myservices/poc-datacollector.html[Data collector - start^]
 
 http://docs.swarmlab.io/SwarmLab-HowTos/swarmlab/docs/build/site/swarmlab_poc-datacollector/docs/index.html[Data collector - Usage^]