Robotic Systems - Arduino

I am researching Arduino to find out about its systems and how they work. Here are a few links about Ardunio.

http://dhsrobotics.pbworks.com/RoboticsSystemsProject

Arduino is an embedded system platform based on a simple open hardware design for a single-board microcontroller, with embedded I/O support and a standard programming language.[1] The Arduino programming language is based on Wiring and is essentially C/C++.[2] The goal of the Arduino project is to make tools available that are accessible, low-cost, low capital investment, flexible and easy-to-use for artists and hobbyists, particularly those who might not otherwise have access to more sophisticated controllers that require more complicated tools.