I have designed and built a robotic 1/10 scale radio control car (See link below). I added an Arduino Nano to a HPI Sprint. I have been using Windows based Arduino C code. This package is too limiting. I am considering getting into http://www.ros.org/wiki which is LINUX based. "ROS (Robot Operating System) provides libraries and tools to help software developers create robot applications. It provides hardware abstraction, device drivers, libraries, visualizers, message-passing, package management, and more." Are any of you WLUG members ROS-ites? My Linux skills have degraded due to lack of use (and old age). Here's a pointer to a youtube showing my robocar being a robot and what it is built of. http://www.youtube.com/watch?v=J-rgkt8WDXQ Ken Jones Fitchburg