Hello Everyone, Probably tutorials is the best way to understand ROS, from basics to more advanced uses. There are more than 100 tutorials now, some very well written while others need improvement. I would suggest adding a comments column and a 5 star rating to each tutorial, that would (1) Clearly spell out how helpful the tutorial is (2) Point out to any flaws and fallacies to what is in the tutorial and what the newbie user experiences (3) Encourage the author of the tutorial to write more of them (4) Popularise ROS amongst the newbies. The comments and 5-star ratings may be just like in a blog etc. Regards Arkapravo -- Arkapravo Bhaumik E-mail : arkapravobhaumik@gmail.com Website : www.mobotica.com Twitter : @abhaumik Facebook : arkapravo@facebook.com Skype : arkapravo