1. First developed systems of writing—5200 years ago
2. Print media a mass phenomenon—1800s
3. 1950—The newspaper was the dominant mass medium
4. Samuel Morse sends the first telegraph message—1844
5. Long-distance communication no longer required physical transportation
6. The first commercial television broadcasts—1920s
7. U.S. Department of Defense—ARPANET—1969
8. World Wide Web publicly accessible—1991
9. Wi-Fi (wireless Internet) publicly available—1999