This document summarizes the evolution of media across four major ages: pre-industrial, industrial, electronic, and information. In the pre-industrial age before 1700, people used basic tools like fire, paper, and handcrafted weapons. During the industrial age from 1700-1930s, steam power and machine tools enabled mass production including printed books. The electronic age from 1930s-1980s saw transistors and electronics bring radio, TV, and computers. Finally, the information age from 1990s-present brought the Internet and digital technologies allowing global communication through social networks and mobile devices.