Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Mouse keys is a feature of some Graphical user interfaces that uses the keyboard (especially numeric keypad) as a pointing device (usually replacing a mouse). Its roots lie in the earliest days of visual editors when line and column navigation was controlled with arrow keys (e.g., hjkl, ESDX). Today, Mousekeys, usually refers to the numeric keypad layout standardized with the introduction of the X Window System in 1984. Historically, MouseKeys supported GUI programs when many terminals had no dedicated pointing device. As pointing devices became ubiquitous, the use of mousekeys narrowed to situations where a pointing device was missing, unusable, or inconvenient. Such situations may arise from the following precision requirements (e.g., technical drawing), disabled user or ergonomics issues, environmental limits (e.g., vibration in car or plane), broken equipment

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