Natural Ergonomics with the Microsoft Elite Keyboard

Microsoft Elite Keyboard - PS2/USB - Ivory
helps you work more comfortably—the split, gently sloped shape of this
ergonomic design keyboard encourages a natural hand, wrist, and forearm
position.
An available PS/2 or Universal Serial Bus (USB) port (USB requires
Windows XP, Windows 2000, Windows Millennium Edition, or Windows 98)
Fully compatible with Windows 95, 98, Me, XP, Vista, & Windows 7