This document discusses Industry 4.0, the current fourth industrial revolution driven by cyber-physical systems. It describes the evolution of previous industrial revolutions and the building blocks of Industry 4.0, including cyber-physical systems, the industrial internet of things, cloud computing, cognitive computing, and advanced materials. It provides examples of how Industry 4.0 is impacting manufacturing companies like Siemens, Trumpf, and GE. Finally, it outlines the significant impacts of Industry 4.0 on economies, businesses, society, and individuals.