SYMBOL FOR NULL
SYMBOL FOR START OF TEXT
SYMBOL FOR END OF TEXT
SYMBOL FOR ACKNOWLEDGE
SYMBOL FOR VERTICAL TABULATION
SYMBOL FOR FORM FEED
SYMBOL FOR SHIFT OUT
SYMBOL FOR NEGATIVE ACKNOWLEDGE
SYMBOL FOR END OF TRANSMISSION BLOCK
SYMBOL FOR CANCEL
SYMBOL FOR SUBSTITUTE
SYMBOL FOR RECORD SEPARATOR
SYMBOL FOR NEWLINE
SYMBOL FOR SUBSTITUTE FORM TWO