One-Hand Keyboard is a keyboard modification program for one hand designed for use by upper extremity amputees and other disabilities that prevent the use of one hand. Once installed, the software creates a mirror image of half of the keyboard on the other half. For example if the left half of the keyboard is mirrored on the right, the "i" key can also be used to type "e" and the "h" key also can type "g." The "Caps Lock" key allows the user to toggle between one- and two-hand typing. This program includes word prediction software so that the user can type continuously without having to select between letters for each key. The manufacturer states that this software is intended to be easy to learn for people who were formerly two-handed typists. COMPATIBILITY: For use on IBM/PC computers running Microsoft Windows XP, Vista or 7.