This one is PS/2 but you can find a USB one. I own 3. One PS/2 for my desktop. One USB for any laptop I use. Finally, a PS/2 to take to the data center because their crash carts have USB. http://cgi.ebay.com/Happy-Hacking-Keyboard-Lite-2-/300500897763?pt=PCA_Mice_Trackballs&hash=item45f73fcfe3