Pretty sure we had that program on our home computer in the 80s (I was a young kid but I distinctly remember a biorhythms program). What impresses me reading i

Pretty sure we had that program on our home computer in the 80s (I was a young kid but I distinctly remember a biorhythms program). What impresses me reading it now is the "y2k" compliance. If the year entered is only two digits, it adds 1900, otherwise it takes the full year.