diff --git a/tech/AI.wiki b/tech/AI.wiki
index f1b96f0..406c9c6 100644
--- a/tech/AI.wiki
+++ b/tech/AI.wiki
@@ -19,4 +19,26 @@ AI or artifical intelligence is the art of making intelligent machines.
 * Deep learning
   * Subset of Machine Learning, makes multilayer neural networks feasible
 
+== Agents ==
 
+An agent is anything that perceives its enviroment thorugh some sensors and
+acts upon the enviroment throught some actuators.
+
+Some types of agents
+
+* Simple reflex
+* Model-based reflex agent
+* Goal based agents
+* utility agesnts
+* learning agents
+
+Example, taxi driver,
+
+* Precepts
+  * Cameras, GPS, microphone, etc
+* Action
+  * Steet, accelerate, break, etc
+* Goal
+  * safe, fast legal comfortable trip, maxmize profit
+* Enviroment
+  * Roads, traffic, pedestrians, customers