Logitech PS/2 Classic Keyboard K100 (920-003199) (Not USB) Compact and space saving to leave you with more valuable work space Spill-resistant design provides protection in case of accidental spills, and allows liquid to drain out of the keyboard. (Tested under limited conditions; max. 60ml liquid spillage; do not immerse keyboard in liquid.) Thin profile helps place your wrists in a neutral position for a more comfortable typing experience Full-size keyboard has a standard layout with an integrated number pad, so you can work without feeling cramped Corded keyboard with PS/2 interface.