With the first operating systems, notably MSDOS, the mouse did not exist, all orders were made in the keyboard. Use the keyboard as only source of order is possible be more productive and more efficient.
HotKeyz is an utility keyboard with one abbreviated keyboard allowing the execution of files, of files or of the lines of orders.Throw applications in his state normal, minimized or maximized. Abbreviated also allow you to reduce, to extend or to close windows. All that without using the mouse, basic keys remain Win, Ctrl, Alt and Shift.