Does it have a built-in computer? Can I just bring a USB stick?
Yes and yes.
The station has a built-in windows computer and usb ports on the front for plugging in a USB stick or device.
There is a keyboard and touchpad in the drawer for operating the computer. Select 'Desktop PC' on the main control screen and tap the computer screen 'window' to make it go full screen. Then use the keyboard and touchpad for control. Tap the screen again to go back to the full control panel.
What the computer has
Demo of switching PC to 'fullscreen' mode
* If you prefer to use a mouse rather than a touchpad, bring your own USB mouse.