Your tiny, dual-display, desktop computer ...and robot brains, smart home hub, media center, networked AI core, factory controller, and much more. You'll recognize the price along with the basic shape and size, so you can simply drop your new Raspberry Pi into your old projects for an upgrade; and as always, we've kept all our software backwards-compatible, so what you create on a Raspberry Pi 4 will work on any older models you own too.