CBreak	Enter cbreak mode. In cbreak mode normal tty line buffering is turned off and characters are available to be read one by one.
Cooked	Leave cbreak mode. Return to normal “cooked” mode with line buffering.
NoTimeout	Not Used at this time
Raw	Enter raw mode.

These are the possible input modes supported by the curses library This replaces many of the curses calls used in the standard library