SYMBOL FOR ACKNOWLEDGE
SYMBOL FOR BACKSPACE
SYMBOL FOR FORM FEED
SYMBOL FOR CARRIAGE RETURN
SYMBOL FOR SHIFT IN
SYMBOL FOR NEGATIVE ACKNOWLEDGE
SYMBOL FOR SYNCHRONOUS IDLE
SYMBOL FOR END OF TRANSMISSION BLOCK
SYMBOL FOR END OF MEDIUM
SYMBOL FOR SUBSTITUTE
SYMBOL FOR RECORD SEPARATOR
SYMBOL FOR NEWLINE
SYMBOL FOR DELETE FORM TWO