What is Arduino?
Arduino is an open-source electronics platform based on easy-to-use hardware and software.
Arduino boards are able to read inputs, like the light on a sensor, when we pressed a button, or read Twitter message – and it also able to turn the input into an output – just like turning a motor, turning on an LED light, publishing something online.
You can tell your board what to do by sending a set of instructions to the microcontroller on the board.
To do so you use the Arduino programming language (based on Wiring), and the Arduino Software (IDE), based on Processing.