Electronic apparatus and instruments; computer software; apparatus for transmission of sound, images or data; electronic devices for sensing and recording motion of a human body (such as arms, legs, hands, feet, head) or of equipment manipulated by a human body (such as clubs, rackets, bats, rods); electronic devices for transmitting data (such as by wireless communication) corresponding to motion of a human body or of equipment manipulated by a human body; software for analyzing motion of a human body or of equipment manipulated by a human body