At its core, a Mini AI PC is exactly what it sounds like: a fully functional computer, shrunk down into a box small enough to fit in your hand. Unlike a Raspberry Pi (which is more like a build-it-yourself science project), Mini PCs come ready to roll. Plug in a monitor, keyboard, and mouse, and you've got a real computer running Windows or Linux — minus the giant tower that looks like it belongs in a 1998 office.