SYMBOL FOR DEVICE CONTROL TWO
SYMBOL FOR NULL
SYMBOL FOR BELL
SYMBOL FOR BACKSPACE
SYMBOL FOR LINE FEED
SYMBOL FOR VERTICAL TABULATION
SYMBOL FOR FORM FEED
SYMBOL FOR SHIFT OUT
SYMBOL FOR SHIFT IN
SYMBOL FOR DATA LINK ESCAPE
SYMBOL FOR NEGATIVE ACKNOWLEDGE
SYMBOL FOR END OF TRANSMISSION BLOCK
SYMBOL FOR FILE SEPARATOR
SYMBOL FOR GROUP SEPARATOR
OPEN BOX