You will also need a computer and an Internet connection (if you don't have all the software and your image already on your computer). Make sure to check the image distribution that you are planning on using for your Single Board Computer before flashing. The minimum card size depends on the Linux distribution. To follow along with this tutorial, you will need an SD card, and a card reader (see related sections for more information on different types). Pictured here: a microSD card with full-size adapter.
Single Board Computers, such as the Raspberry Pi, use SD and microSD cards to house various operating systems.