Here are the modifier key symbols you may see in OS X menus:
(Command key) – On some Apple keyboards, this key also has an Apple (
) logo
(Control key)
(Option key) – “Alt” may also appear on this key
(Shift key)
(Caps Lock) – Toggles Caps Lock on or off
Fn (Function key)
One day, we all can free our fringers from typing on QWERTY keyboard as we can use our Brain to type in the future. The video shown below is a “serious research” that shows two guys type WITHOUT keyboard. There isn’t any much word and information about the research, however, from the video, we can see that this technology will be available pretty soon.