Raspberry Pi Zero
No, this is not a typo. The Raspberry Pi Zero really is a computer that costs only $5, or less than your average pumpkin spice latte. The chip is also smaller than a dollar bill! Yes, you need a few additional accessories to get the Pi Zero completely going, but still, one can’t help but marvel at the long way the industry has traveled since the days when computers could only fit in university auditoriums and cost more than the annual budget of a small country.