The Keyspan USB to PS/2 Keyboard/Mouse Adapter. $14.95 and twice as useful on a rainy day. One for the legacy tech files.
This adapter makes it easy to connect a PS/2 keyboard and PS/2 mouse to a USB port on your PC or Mac. It is compatible with all brands of PS/2 keyboards and mice. Windows: No driver software is required — just plug the PS/2 keyboard and mouse into the adapter, then plug the adapter into the USB port. The keyboard and mouse work within seconds.