Electrical and scientific apparatus; portable and handheld digital electronic devices for recording, organizing, transmitting, manipulating, playing and reviewing text, data and audio files and software related thereto; electronic devices for the recording/playing of digital audio recordings and software related thereto; MP3 (motion picture experts group layer 3) players/recorders and software related thereto; computer software for use in organizing, transmitting, manipulating, and reviewing text, data, and audio files on a portable and handheld digital electronic devices