Abstract It is difficult to summarize adequately all of the issues associated with Science and Technology (S&T) in the international arena. Therefore I have chosen three types of S&T as illustrative examples of future areas, and even these are presented, at best, in a sketchy fashion. The first, I shall call “Essential Science and Technology.” This is that part of the S&T enterprise which is necessary for the flourishing of the human race. It affects the rich and poor nations alike. The second is called “Industrial Science and Technology.” This, as the name implies, is concerned with industrial development. The third is “Mega Science and Technology.” The word mega is used in the accepted sense to denote a large project.