A compact keyboard without the numeric keypad, which allows placing the mouse closer to the keyboard. Research shows that 90% of users do not use the numeric keypad, if ever. With a compact keyboard you work more comfortably, because it lowers the reaching distance to the mouse (Cook C. et al., 1998). This lightens the load on the forearms and shoulder. Dark letters on a clear background make reading easier (ISO 9241) and contribute to higher productivity (Snyder, 1990).