The HD In-skin hardware is rather interesting as it has an ethernet jack (future use) and two USB ports for keyboard/mouse. Connect a monitor to the VGA output and you'll see the OS is XP 'Embedded'. The admin software is quite straight-forward and very easy configure and you can admin locally (serial port), via modem, or offline (very cool). If you familiar with the Pathfinder and/or Dispatch, the HD is a snap. The only thing I don't like is every time you change something and click 'save' it has to upload the changes to the system. That makes remote administration a bit slow.