The document discusses the five generations of computers from the first to fifth generation. The first generation used vacuum tubes, were very large in size, and had slow processing speeds. The second generation used transistors, were smaller in size, and had faster processing speeds. The third generation used integrated circuits which incorporated many transistors on a single chip, were smaller than the second generation, and had faster processing than the second generation. The fourth generation used very large scale integration incorporating millions of transistors on a single chip, were smaller than the first generation, and had faster processing than the first generation. The fifth generation will use artificial intelligence as the technology.