Operating System : POSReady 2009 Processors : Intel Celeron T3100 Memory Support : 2 GB DDR3 SODIMM Hard Drive : 500 GB Removable Storage : External CD-RW/DVD or DVD-RW Expansion Slots : 2xPCI I/O Ports : 2 x USB, 4 x RS-232, 2 x PS/2, 2 x VGA, Parallel, Audio I/O, 3 x Porwer USB, 7 x Serial RS-485 Communications : Ethernet, Fast Ethernet Dimensions : 32 x 47.5 x 11.7 cm Weight : 11 kg