SYMBOL FOR DELETE
SYMBOL FOR NULL
SYMBOL FOR END OF TEXT
SYMBOL FOR BACKSPACE
SYMBOL FOR CARRIAGE RETURN
SYMBOL FOR SHIFT OUT
SYMBOL FOR DATA LINK ESCAPE
SYMBOL FOR NEGATIVE ACKNOWLEDGE
SYMBOL FOR SYNCHRONOUS IDLE
SYMBOL FOR CANCEL
SYMBOL FOR ESCAPE
SYMBOL FOR FILE SEPARATOR
SYMBOL FOR GROUP SEPARATOR
SYMBOL FOR RECORD SEPARATOR