During the February 2015 meeting PARS member, Pete Zawasky AG7C, gave the group a briefing on his personal amateur radio project using the deck of cards-sized Raspberry Pi 2 quad-core, single-board computer (and other components) to allow him remote antenna rotator control via the Internet. The Raspberry Pi computer is a very low cost computing unit that lends itself to learning and experimentation.
Pete AG7C holds the hardware brains of his automation project.
Here Pete demonstrates just how compact and portable the powerful and full-functional computer is. There are many amateur radio project possibilities with this technology.
More info. on Raspberry Pi:
http://en.wikipedia.org/wiki/Raspberry_Pi
http://www.arrl.org/files/file/QST/This%20Month%20in%20QST/April%202014/Ewing.pdf