CONVERSION BETWEEN SINGLE CHARACTER AND ASCII CODE
ASC converts one character to ASCII code
CHR converts ASCII code to one character
CONVERSION BETWEEN STRING AND SERIES OF ASCII CODES
SERSTR converts string to series of ASCII codes
STRSER converts series of ASCII codes to string
CONVERSION SOURCE STRINGS
CHARALL string of all ASCII characters
CHARCTRL string of 32 blanks for control characters
CHARDISP string of all displayable characters
CHARDRAW string of graphics characters
CHARINTL string of accented and other international letters
CHARMATH string of math characters
CHARPRINT string of all printing characters