ocr: Tou use the Microsoft Natural Keyboard, you need: APC or compatible with: 286 or higher processor MS-DOSE operating system version 2.0 or later One PS/20-compatible mouse port, or one 5-pin DIN keyboard port - The keyboard is NOT compatible with a serial port. MDA, CGA, EGA, VGA, SVGA, XGA, or VESA VCI-compatible video adapter To take advantage of the IntelliType software and Windows function keys, you also need: Microsoft WindowsTM operating system version 3.1 or later One 3.5" disk drive or one 5.25" High Density disk drive