Having not seen every single all-in-one PC that's ever been released, we'll stop short of saying the InFocus BigTouch is the largest AiO ever to grace the Earth. That said, it's pretty damn enormous. What we have here is a 55-inch Windows 8 machine -- far larger than you probably have room for on your desk -- and it's intended specifically for classrooms, conference spaces and office lobbies. Basically, any scenario where lots of people will need to see or use the computer at once. Given that, its connectivity options are perhaps more extensive than what you'll find on a regular consumer desktop: six USB port