The Raspberry Pi is a general purpose computer, more often than not running under a Linux Operating System (OS).
Raspberry Pi’s can run multiple complex programs.
The Arduino Uno is a microcontroller board which is a simpler computer (compared to the Raspberry Pi) and can run one program at a time.
The Arduino Uno is very easy to use and is ideal for the beginner to Hackerspaces/Makespaces.
Continue Reading Arduino Board Tutorial for Hackerspace Beginners