At some time in the twenty-first century the United States will start the transition into an economy with no human work. After the inflection point, job destruction will be greater than job creation and overall employment will decline. Once the decline starts it will continue and human employment over the next several centuries will approach a very small fraction of current employment, perhaps even zero. This book deals with the transition, not the end result. Chapter 3 focuses on the evolution of digital technology starting with what types of information objects can be represented by binary numbers. The basic technology to process binary numbers is integrated circuits. Its evolution and Moore’s law are discussed. Hardware consists of systems of integrated circuits that process binary numbers following software instructions. A summary of the evolution of digital technology hardware and software is presented. A subtopic of software is artificial intelligence applications. Next is the evolution of analog and digital communication. The advance of this technology has created a political economic social nervous system. The final topic is the impact of the advance of digital technology on discovery and invention.