On-Screen Keyboard, OSK is a feature found in Microsoft Windows that allows a mobility-impaired user to use their mouse to select keys on the keyboard. This keyboard has a layout like a standard keyboard, including all letters, symbols, numbers, and system keys like Home, Page Up and Page Down, End, Insert, Ctrl, Alt, Caps, and Shift. The OSK can be used instead of a hardware keyboard to type in a virtually any software program.
