Internal Program Version:  Ncurses 5.9  (The HEADER-Files)

The Ncurses (new curses) library is a free software emulation of
curses in System V Release 4.0, and more. It uses Terminfo format,
supports pads and color and multiple highlights and forms characters
and function-key mapping, and has all the other SYSV-curses
enhancements over BSD Curses.

http://invisible-island.net/ncurses/ncurses.html