Arduino Nano Kit Compatible V3.0 with Bootloader CH340 USB Driver (Nano Black & Blue are the same in functionality)
Arduino started as an open-source computer hardware and software project and user community that designs and manufactures microcontroller-based kits for building digital devices and interactive objects that can sense and control the physical world.
The Arduino software is also open-source. The source code for the Java environment is released under the GPL and the C/C++ microcontroller libraries are under the LGPL."
The open source project sought to provide an inexpensive and easy way for hobbyists, students, and professionals to create devices that interact with their environment using sensors and actuators. Common examples for beginner hobbyists include simple robots, thermostats and motion detectors.