Today, people send emails, text messages, and status updates instantaneously. But not so long ago, messages were handwritten and travelled no faster than people could carry them. With the invention of the telegraph and then the telephone, instant communication was born. Radio and television created an industry for mass entertainment that continues to grow, and the computer age changed how data is crunched. With the invention of the internet in the 1980s, the world of communication has truly shrunk.