* ROS 0.4 Mango Tengo was released on February 10th.
* 2/10/2009: ROS 0.4 Mango Tango released<ref>{{cite web|url=http://www.ros.org/news/2009/02/|title=ROS robotics news: February 2009 Archives|website=www.ROS.org|access-date=12 December 2017}}</ref>
* 2/16/2009:On February 16th RVIZ's first documentedversion of documentation released.
* 5/12/2009:The Firstfirst published paper on ROS is published: ''ROS: an open-source Robot Operating System'' 5/12/2009on May 12th (Authors: Morgan Quigley, Ken Conley, Brian Gerkey, Josh Faust, Tully Foote, Jeremy Leibs, Rob Wheeler, [[Andrew Ng|Andrew Y Ng]])<ref name=Quigley-ROS />
* 8/16/2009: ROS.org comes___domain onlineis put up on the web on August 16th.<ref>{{cite web|url=http://www.ros.org/news/2009/08/welcome-to-ros-org.html|title=Welcome to ros.org - ROS robotics news|website=www.ROS.org|access-date=12 December 2017}}</ref>
* 12/2/2009:The Firstfirst ROS tutorialsTutorial releasedis published on December 12th.<ref>{{cite web|url=http://www.ros.org/news/2009/12/ros-tutorials-and-turtles.html|title=ROS Tutorials and Turtles - ROS robotics news|website=www.ROS.org|access-date=12 December 2017}}</ref>
