Thank you for pointing that out. The choice of a single source file is a great C feature. The author appears to have started from a few hundred lines in 2006. Grew that 10x, to a few thousand. Curses/ ncurses bring back good memory of various mail and news readers. I bet a few of you tried curses/ ncurses. IMO, character user interface has its efficiency; prefers CUI to icon bars, ribbons, etc.