D-E-F

DESTRUCTIVE-BACKSPACE
DISABLE-COMP-CODES
DISABLE-MESSAGES
DISPLAY-COLUMNS (SCREEN-COLUMNS)
DISPLAY-CONTROL-CHARACTERS
DISPLAY-MEMORY-RESPONSE (PRIMARY-STATUS-RESPONSE)
DISPLAY-ROWS
DO-FORM-FEED
ENQ-ACK
FORMAT-MODE
FORMS-BUFFER-SIZE