The document discusses the evolution of microprocessor technology from 1971 to the present. It describes the key developments including the earliest 4-bit microprocessors from Intel like the 4004. It then outlines the progression to 8-bit, 16-bit, 32-bit, and 64-bit processors, highlighting models like the 8080, 8086, 80286, 386, 486, Pentium, and Itanium. The document also notes how Moore's Law has allowed the number of transistors on chips to double every two years, and discusses dual core and other emerging technologies that will help extend Moore's Law into the future.