An empty file was also the infinitely profitable program: http://peetm.com/blog/?p=55 http://peetm.com/blog/?p=55 On CP/M, it was useful to rerun the previous p

An empty file was also the infinitely profitable program: http://peetm.com/blog/?p=55 http://peetm.com/blog/?p=55 On CP/M, it was useful to rerun the previous program that was still in memory.