What he's saying is that it's a bare component. Generally a PC is a usable system.
One will still need to add a powersupply and case at a minimum. (And then you can plug in your power, keyboard/mouse/monitor, etc.)
One will still need to add a powersupply and case at a minimum. (And then you can plug in your power, keyboard/mouse/monitor, etc.)
Edit: it looks like it comes with a power adapter, so it's effectively a fully functional computer out of the box (just as much as any system without kb/monitor).