Special Features:

Keyboard with trackball

Properties:

An item specifically designed to provide information to a computer (as modified), but cannot be assigned a more definitive item name. data may be entered by the setting of toggle, rotory, thumbwheel and/or pushbutton switches. the item may provide limited indication facilities such as leds, indicator lights or the like. see also joystick, data entry; keyboard, data entry; mouse, data entry; optical reader, data entry; touchscreen, data entry; trackball, data entry; and scanner, optical.